Hello.
user
Hello, how may I help you?
assistant
Due to change in my plans to visit Dallas, I would like to change my existing reservation. Can you help me with this?
user
Sure. Can you please tell me your name?
assistant
My previous reservation has done with the name Matthew Lopez.
user
Sorry, there is no reservation with your name to change further.
assistant
Ok, not an issue. May be something wrong while booking the ticket. Thank you for providing information.
user
Thank you for choosing us, have a great day.
assistant