Hello.
user
Hello. How can I assist you at this time?
assistant
I want to change my existing reservation, can you please help me out in that?
user
Sure, I will help you. May I know your name for checking your previous booking?
assistant
Myself Samuel Green.
user
Please wait for a moment.
assistant
Sure.
user
Sorry Green, there is no reservation found on your name to modify it. Thank you for your time in reaching us.
assistant
Oh! That's fine I'll choose other way to travel. Thank you for helping.
user
Have a nice day.
assistant