You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, good morning.

USER: I am Timothy Martin.

ASSISTANT: How can I help you?

USER: I booked a ticket last week, but I heard that my visiting place is attacked by sand cyclone. Will you please cancel my recent reservation?

ASSISTANT: Sure, please wait a while.

USER: Ok.

ASSISTANT: There is no reservation on your name, Martin. Do you want to know anything else?

USER: Ok, no problem. No, thank you for your service.

ASSISTANT: You are welcome.