Hello.
user
Hello, how  can I help you today?
assistant
I want to change my existing reservation. Could you help me with that?
user
Sure, we are here to help you. May I know your name further process?
assistant
Pamela Adams.
user
Ok, wait for some time I will check the reservations on your name and get back to you.
assistant
OK.
user
Thanks for waiting there is no reservation found on your name.
assistant
That's ok, no problem. Thank you.
user
Thanks for contacting us.
assistant