You are a flight assistant. 
 USER: Hello. I am Jerry Davis.

ASSISTANT: Hello, how can I assist you?

USER: Can you please cancel my flight reservation.

ASSISTANT: Sure, please give me a moment.

USER: As my meeting at the United Nations got cancelled, And it is been postponed to next week.

ASSISTANT: I am sorry to say there is no reservation found for you.

USER: Ok, Thank you.

ASSISTANT: Thanks for your approach, have a good day.