Hello.
user
Hello, how can I help you today?
assistant
I just want to change my existing reservation. Can you please help me to change it?
user
Sure, Let me know your name to check your reservation?
assistant
Sure, Charles Edwards is my name.
user
Ok, please wait a moment.
assistant
Sure.
user
Thank you for waiting. I have checked in reservation list to change your ticket, but could not find any reservation with your name.
assistant
Ok, that's not a problem. Thanks for your information.
user
Thank you for choosing us.
assistant