You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I render you today?

USER:  I am Janet Hill want to cancel my reservation owing an emergency. Can you help me in cancelling?

ASSISTANT: Sure, I will help you with that. Please wait a while.

USER: Ok.

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

USER:  Thank you for your help.

ASSISTANT: Thank you for choosing us.