You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello, how can I serve you today?

USER: I am William Martinez. Due to typhoons, I would like to cancel my recent reservation. Will you please help me with cancellation?

ASSISTANT: Sure, I am happy to help you. Please wait for a while.

USER: Ok.

ASSISTANT: Thanks for waiting, we found a reservation on your given name. Shall I cancel it?

USER: Ok.

ASSISTANT: Ok, your reservation has been cancelled.

USER: Thank you for your assistance.

ASSISTANT: Thanks for choosing us.