You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, what can I do for you?

USER: I am Richard Johnson. I am planning to cancel my recent reservation, due to some urgent work. Can you help me out?

ASSISTANT: Please wait a while.

USER: Sure.

ASSISTANT: Your previous reservation is cancelled.

USER: That's great. Thank you for your help.

ASSISTANT: Thanks for reaching us.