"little reservation" is a correct and usable phrase in written English.
It can be used when referring to a small amount of doubt or uneasiness, or a slight hesitation in doing something. For example: "I had a little reservation about starting the project, but I decided to go ahead anyway."
I had it stored in various places around L.A". "I've always had a little reservation about showing," he said yesterday in New York.
The physicians are particularly annoyed with patients who, after their employer makes a change in a health plan, drop them with seemingly little reservation just because they can no longer participate in that plan.
One writer marvelled at Osage girls who attended the best boarding schools and wore sumptuous French clothing, as if "une très jolie demoiselle_ _of the Paris boulevards had inadvertently strayed into this little reservation town".
"Like [owner] Paul [Reddam] said, I had a little reservation a month or so ago because of Mohaymen being in his own backyard," trainer Doug O'Neill said.
Mohammed supposedly had knowledge of brewing terrorist plots against the United States, and Bush had little reservation about using the practice of simulated drowning on the detainee to extract them.
His latest and greatest 3D visual setup, titled HOLO, has been kept under wraps in the months leading up to the event, but we have little reservations in declaring it his biggest setup yet.
Sometimes they spoke some English; they were always patient, and the little pasteboard reservation cards they gave us always turned out to be for the right trains at the right times on the right tracks.
Al-Ghazālī, al-Suhrawardī, Ibn al-ʿArabī, and Avicenna were then eagerly studied and (except for their doctrine of the imamate) embraced with little or no reservation.
When Accenture asked to include Unilever in the campaign, "there was a little bit of reservation" initially, Mr. Eelman said, but the approval came because "Accenture has been a partner in this journey with us".
She takes Father Damien's cassock and his name and, thus disguised, serves as priest and confessor to the Little No Horse reservation until her (that is his?) death.
Adds a powerful Hollywood agent, "The general wisdom is that Sumner is a little off the reservation.
