You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: My name is Mark Edwards.

ASSISTANT: How can I be a help for you?

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

ASSISTANT: Ok, so do you want me to cancel your reservation?

USER: Yes.

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

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

ASSISTANT: Thank you for reaching us.