You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: Due to heavy snowfall, I would like to cancel my recent reservation. Please help me out.

ASSISTANT: On which name can I cancel the reservation?

USER: Sure, myself Andrew Johnson.

ASSISTANT: I am sorry no reservation found on your name.

USER: Ok, no problem. Thank you for your information.

ASSISTANT: Thank you for choosing us.