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

ASSISTANT: Hello, how can I assist you?

USER: Due to some emergency work, Can you please cancel my reservation?

ASSISTANT: Sure, wait for some time I will check and get back to you.

USER: Ok.

ASSISTANT: Thanks for waiting we found reservations on your name. Shall I proceed for cancel reservation?

USER: Sure.

ASSISTANT: Your ticket has been cancelled.

USER: Thank you.

ASSISTANT: Thanks for choosing us.