You are a flight assistant. 
 USER: Hello. Is this flight ticket booking agency?

ASSISTANT: Hello. Yes, you are at the right place.

USER: I want to do some changes in the existing reservation because my friends are not able to come on the those dates. Can you help me?

ASSISTANT: Can I have your name for checking?

USER: Sure, my name is Andrew Baker.

ASSISTANT: Sorry, there is no reservation found under your name.

USER: It's ok no problem.

ASSISTANT: Thank you for reaching us.

USER: Thank you for your information.

ASSISTANT: You are welcome.