You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I be of your help?

USER: I need your assistance in cancelling my ticket because, my friend suddenly met with an accident.

ASSISTANT: Sure, I'll try to cancel your ticket.

USER: Thank you.

ASSISTANT: Please let me know your name to check the reservation status.

USER: Sure, I reserved my seat previously with name Patrick Carter.

ASSISTANT: Ok, please wait a moment.

USER: Sure.

ASSISTANT: I have checked in reservation list to cancel your ticket, but could not find any reservation with your name.

USER: Ok, thanks for sharing the information.

ASSISTANT: Thank you for availing you.