You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: I want to cancel my reservation, due to some problems I am unable to travel those dates so can you please cancel my reservation?

ASSISTANT: May I know your name please?

USER: Sure, my name is James Martinez.

ASSISTANT: I am sorry no reservation found on your name.

USER: Oh! It's ok no problem. Thank you for your information.

ASSISTANT: Thank you for choosing us.