You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

USER: Could you help in cancelling the recent reservation?

ASSISTANT: I would be happy to help you.

USER: OK.

ASSISTANT: Sorry, there is no reservation found.As per your requirement.

USER: OK, thank you.

ASSISTANT: Can you tell me your name?

USER: Yes, my name is Patrick Williams.

ASSISTANT: Thank you.