Sentence examples for Hello there from inspiring English sources

"Hello there" is a correct and usable sentence in written English
You can use it in a variety of contexts, such as when you want to greet someone warmly, or when you want to draw someone's attention to something. For example, you might write an email to a colleague, saying, "Hello there! I'm writing to let you know that the deadline for the project has been moved up to next week."