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

ASSISTANT: Hello, how may I aid you today?

USER: Owing to an emergency, I would like to cancel my recent reservation. Can you please help me with cancellation?

ASSISTANT: Sure, please wait for a moment, I will check and revert to you.

USER: Ok.

ASSISTANT: There is no reservation found on your name.

USER: Thank you.

ASSISTANT: Thank you for making us as your assistance.