You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I aid you today?

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

ASSISTANT: Sure, I am here to help you.

USER: Thank you.

ASSISTANT: May I know your name?

USER: My name is Mark Davis.

ASSISTANT: Your reservation is found and I cancelled successfully.

USER: Thank you for your service.

ASSISTANT: Thank you for choosing us.