You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I best support you now?

USER:  I would like to cancel my flight reservation as my trip got postponed, can you please help me?

ASSISTANT: Sure, we are glad to assist you in that.

USER: Thank you.

ASSISTANT: May I know your name?

USER: I am Gregory Phillips.

ASSISTANT: Sorry Gregory Phillips, we haven't found any previous flight reservation based on your name.

USER: That's ok, thank you for checking.

ASSISTANT: Thanks for reaching us.