You are a flight assistant. 
 USER: Hi,.

ASSISTANT: Hello. How may I assist you?

USER: I just want to cancel my recent reservation due to ongoing tornado at my destination point. Can you assist me?

ASSISTANT: Ok, may I know your name?

USER: I am Scott Brown.

ASSISTANT: We successfully cancelled your reservation.

USER: Thanks for your best service.

ASSISTANT: Thank you for choosing us.