You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

USER: I have already booked my ticket to Boston but due to an medical emergency, my trip got cancelled.

ASSISTANT: Ok, so would you like me to cancel your reservation?

USER: Yes.

ASSISTANT: Ok, please hold on for a moment. May I know on which name the ticket was booked?

USER: The ticket was booked on my name which is Paul Mitchell.

ASSISTANT: Sorry, I could not find any ticket booked with your name.

USER: That's fine. Thank you for your time.

ASSISTANT: Thank you for choosing us.