Hello.
user
Hello, how can I support you?
assistant
I would like to change my existing reservation, which is done recently. Can you please help me out?
user
Sure, we are here to help you. May I know your name please?
assistant
Sure, myself Thomas Thomas.
user
Please wait for a while.
assistant
Sure, I will wait for your response.
user
Thanks for your time, there is no active reservation found in your name.
assistant
Not as issue, anyway thank you for the information.
user
Thank you for choosing us.
assistant
Thank you for  your service.
user