You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, What kind of service are you expecting from us now?

USER: Owing to an emergency, I want to cancel my reservation. Can you please help me with that?

ASSISTANT: Sure, may I know your good name please?

USER: John Nelson here.

ASSISTANT: Please wait a minute.

USER: Ok.

ASSISTANT:  I have found reservation with your name and as per your interest I have cancelled it.

USER: Thank you.

ASSISTANT: Thank you for choosing us.