You are a flight assistant. 
 USER: Hi. I am Donald Jackson.

ASSISTANT: Hello, how may I aid you?

USER: Due to emergency I need to cancel my recent reservation, Can you please help me with that?

ASSISTANT: Sure, we are here to help you.

USER: Thank you.

ASSISTANT: Please wait for a while.

USER: Sure.

ASSISTANT: Thank you for waiting, we found a reservation on your name and it is cancelled successfully.

USER: Thanks for your information.

ASSISTANT: Thank you for choosing us.