You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

USER: My name is Micheal Nelson. Due to a sudden meeting, my trip is cancelled. Could you help me in cancelling the reservation?

ASSISTANT: Sure, I will help you.

USER: Ok.

ASSISTANT: Sorry Nelson, there is no reservation found with your name.

USER: That's ok.

ASSISTANT: Thank you for choosing us.

USER: Thank you for your time.