Hello.
user
Hello, how can I be a help for you?
assistant
I have made a mistake while booking the ticket. I would like to change my existing reservation. Can you help me?
user
Sure, I will help you. May I know your good name please?
assistant
My name is Gary Parker.
user
Sorry, there is no reservation found on your name in our data base to change.
assistant
Ok, I think I didn't book the ticket. Anyways, thank you for the information.
user
You are most welcome.
assistant