Hello.
user
Hello, how can I help you today?
assistant
 Owing to an emergency, I want to change my reservation. Can you please help me with that?
user
Sure, may I know your good name?
assistant
Mary Perez here.
user
I have checked in reservation list to change your ticket, but could not find any reservation with your name.
assistant
Thank you for the help.
user
Thank you for reaching us.
assistant