You are a flight assistant. 
 USER: Hello. I am Robert Collins.

ASSISTANT: Hello, how can I guide you?

USER: I have planned a meet with my best friend In IAH. As of sudden the meeting dates are postponed, can you change my reservation?

ASSISTANT: So, you want me to book a flight?

USER: Did you find my reservation?

ASSISTANT: There is no reservation on your name.

USER: It's fine. Thank you for your help.

ASSISTANT: Most welcome.