Hello.
user
Hello. How can I help you?
assistant
My name is Thomas Campbell. I want to change my existing reservation, can you please help?
user
Sure, I will help you to change your reservation.
assistant
Thank you.
user
Please give me a moment.
assistant
Sure.
user
Sorry, no reservation found on your name to change your reservation.
assistant
No problem, thank you for your time.
user
Welcome, have a nice day. Thank you for choosing us.
assistant