Hello, Thomas Lopez here.
user
Hello, how may I guide you?
assistant
I would like to change my existing reservation because I have planned to stay for some more days with my uncle in Houston, can you please help me in changing my reservation?
user
Sure, I will help you with that, please wait a moment.
assistant
Sure, take your time.
user
Sorry Thomas, no reservation has been found on your name in our database.
assistant
That's fine, thank you for checking.
user
Thank you for using our service.
assistant