You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

USER: Due some health issues, I am unable to travel for the trip. So, I decided to cancel my ticket. Can you please help me?

ASSISTANT: Sure, I will help you in cancelling the reservation.

USER: Thank you.

ASSISTANT: May I know your name please?

USER: My name is Jerry Davis.

ASSISTANT: Ok, please wait a moment.

USER: Sure.

ASSISTANT: Happy to inform you there is a reservation.

USER: That's great, you can proceed with cancelling the ticket.

ASSISTANT: Ok, your ticket has been cancelled.

USER: Thank you for checking and cancelling my ticket.

ASSISTANT: Thank you for choosing us.

USER: You are welcome.