You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I support you at this moment?

USER: I need to modify my reservation as my schedule go changed to some other dates. Can you help me with that?

ASSISTANT: Sure, may I know your name?

USER: Sure, my name is Amanda Lewis.

ASSISTANT: Please wait, I will check the reservation on your name and get back to you.

USER: Sure.

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

USER: Not a problem, anyways thank you for the information.

ASSISTANT: Thank you for approaching us.