Hi.
user
Hello.
assistant
I am Gary Thompson.
user
How can I support you today?
assistant
 I need to change my existing reservation. Due, to postpone of my document verification in office. Can You help me out?
user
Sure. Please, wait.
assistant
Sure, I will wait for your response.
user
Thanks for waiting, there is no reservation found on your name.
assistant
Not an issue. Thank you for your kind information.
user
Thank you for availing us.
assistant