You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, Good Morning.

USER: My name is Larry Carter.

ASSISTANT: Larry, how may I guide you?

USER: I have already booked my ticket to Boston, due to a medical conditions I would like to cancel my trip.

ASSISTANT: Sure, do you want me to cancel your existing reservation?

USER: Yes, can you please help me with that?

ASSISTANT: Sure, please hold on for a moment while I check for any existing reservations with your name.

USER: Ok, please check. That's fine.

ASSISTANT: I am sorry to inform you that there are no active reservations with your names.

USER: Thank you for your time.

ASSISTANT: Thank you, have a good day.