Hi,.
user
Hello, how can I assist you today?
assistant
Please change my existing reservation owing to an emergency.
user
Sure, I will help you with that. Let me know your name to check your reservation?
assistant
I am Nicholas Green.
user
Please wait a while.
assistant
Ok.
user
 I have checked in reservation list to change your ticket, but could not find any reservation with your name.
assistant
Thanks.
user