You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you today?

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

ASSISTANT: Sure, I will help you. Please help me with your name.

USER: I am Timothy Garcia.

ASSISTANT: Please allow me a minute.

USER: Sure.

ASSISTANT:  Timothy Garcia, I am really sorry to inform you that there is no booking found on your name.

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

ASSISTANT: Thank you for reaching us, have a great time!.