You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you?

USER: My name is Charles Collins. Owing to an emergency I want to cancel  my recent reservation, can you please do it for me?

ASSISTANT: Sure, please wait for a moment.

USER: Ok, take your time.

ASSISTANT: I have found a reservation on your name and cancelled it successfully.

USER: Thank you.

ASSISTANT: You are welcome.