You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

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

ASSISTANT: Yes, can you tell me your name?

USER: I am Cynthia Carter.

ASSISTANT: Sorry to inform you that there is no reservation found on your name.

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

ASSISTANT: Thank you for reaching us.