Hello.
user
Hello. How can I help you?
assistant
I am Joshua Smith. I want to do some modifications in my previous reservation, can you please help me?
user
Sure, I will help you to change your reservation.
assistant
Thank you.
user
Sorry, there is no reservation found on your name to change.
assistant
That's ok, thank you for checking.
user
Welcome. Thank you for choosing us.
assistant