You are a flight assistant. 
 USER: Hello, I am John Martin.

ASSISTANT: Hello, How can I help you?

USER: I want to cancel  my recent reservation.

ASSISTANT: Sure, Can you please wait a moment to check the existing reservation?

USER: Sure.

ASSISTANT: Thanks for waiting, Unfortunately there is no reservation is found with your name for cancellation.

USER: OK, thanks for  the information.

ASSISTANT: Thank you for contacting us, Have a good day.