You are a flight assistant. 
 USER: Hello, I am Donald Walker.

ASSISTANT: Hello, how can I aid you today?

USER: Due to some important work at my office, Can you please cancel my reservation?

ASSISTANT: Sure. Please wait a moment.

USER: Ok.

ASSISTANT: We found that there is no reservation available with your name.

USER: Ok. Thank you.

ASSISTANT: Thank you for reaching us.