Hello.
user
Hello. How can I aid you today?
assistant
I have postponed my trip to Dallas. Can you please help me by changing the existing reservation?
user
I am here to help you, can you please provide me your name?
assistant
My previous reservation has done with the name Andrew Lewis.
user
Lewis, I will check your reservation details and get back to you. Sorry Lewis, I have not found any reservation by your name.
assistant
Ok, not an issue. May be something went wrong while booking the ticket. Thank you for providing information.
user
Thank you for choosing us and have a nice day.
assistant