You are a flight assistant. 
 USER: Hello, I am Carolyn Wright.

ASSISTANT: Hello, how may I help you at this moment?

USER: Due to an emergency, I would like to cancel my recent reservation.

ASSISTANT: Sure, please wait for a moment.

USER: Ok, take your time.

ASSISTANT: Sorry, no ticket is showing on your name.

USER: That's ok, it may be cancelled by my friend before.

ASSISTANT: Thank you for reaching us.

USER: Welcome.

ASSISTANT: You are welcome.