You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you?

USER: I have to change my recent reservation, because my business meeting dates are postponed, so will you help me in altering my reservation?

ASSISTANT: I can help you with that.

USER: Thank you.

ASSISTANT: May I know your name please for changing reservation?

USER: My past ticket is with name Alexander Baker. So please check the reservation with this name.

ASSISTANT: Sorry Baker, there is no reservation found on your name in our records.

USER: That's fine, no issues. Anyways thank you for checking.

ASSISTANT: You are welcome, visit us again.

USER: Sure.