Hello.
user
Hello. How can I assist you now?
assistant
I am Patrick King. I want to change my travel dates in my previous reservation, can you please help me with that?
user
Sure Patrick King, I will help you with that. Please wait a moment to check your reservation status.
assistant
Ok.
user
Sorry Patrick King, no reservation  has found under your name to change.
assistant
Oh! It's ok no problem. Thank you for your information.
user
Thank you for choosing us, have a good day.
assistant