You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I be at your service today?

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

ASSISTANT: Sure, I can cancel your reservation right now. Before that I need to know your good name please?

USER: I am Christopher Moore.

ASSISTANT: Sorry, there is no reservation matching with your name in our portal.

USER: Ok, no issues. Thank you for checking.

ASSISTANT: Thank you for choosing us.