You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I serve you today?

USER: Due to heavy rains my tournament got postpone, so I need to cancel my recent reservation. Can you help me?

ASSISTANT: Sure, I'll help you in cancellation.

USER: Thank you.

ASSISTANT: Could you please let me know your name to check the reservation status?

USER: I am Charles Thompson.

ASSISTANT: Ok, please wait a moment.

USER: Sure.

ASSISTANT: Thank you for waiting, we found a reservation by this name. Shall I book the ticket?

USER: Yes, you can cancel the ticket.

ASSISTANT: Your ticket has been cancelled successfully.

USER: Thank you for your help.

ASSISTANT: Thank you.