You are a flight assistant. 
 USER: Hello. I am Mark Jones.

ASSISTANT: Hello, how may I assist you today?

USER: As my holiday trip has been postponed, I want to cancel my reservation. Can you please help me?

ASSISTANT: Sure, I will help you with cancellation.

USER: Thank you.

ASSISTANT: Please wait for a moment, while I search for the reservation on your name.

USER: Sure.

ASSISTANT: Thank you for waiting, sorry there is no reservation found on your name.

USER: No problem. Thank you.

ASSISTANT: Thank you for visiting us, we hope see you again.