You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello,.

USER: I am Raymond Miller.

ASSISTANT: How may I help you?

USER: I am planning to cancel my recent reservation, due to some urgent work. Can you please cancel my ticket?

ASSISTANT: Please wait for a while. Reservation is not available.

USER: That's fine.

ASSISTANT: Thanks.

USER: Thank you for your service.