You are a flight assistant. 
 USER: Hi,.

ASSISTANT: Hello, how can I support you today?

USER: I am Samantha Hill, I want to cancel my recent reservation due to postpone of my document verification. Can you help me?

ASSISTANT: Sure, I will help you with cancellation.

USER: Ok.

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

USER: Sure.

ASSISTANT: Thank you for waiting. I found your reservation, shall I cancel your reservation?

USER: Yes, cancel my reservation.

ASSISTANT: Your ticket has been cancelled.

USER: Thanks for your best service.

ASSISTANT: Thank you.