Hi.
user
Hello, How exactly I can serve you the best today?
assistant
Could you help me to amend my existing reservation?
user
 Sure, May I know your name?
assistant
I am Gregory Moore.
user
Please wait a moment.
assistant
Sure.
user
Sorry, no reservation found on your name.
assistant
Not a problem, thank you for the information.
user
Thank you for reaching us.
assistant