Hello.
Hello, how may I assist you?
Due to change in my plans to visit Dallas, I would like to change my existing reservation. Can you help me with this?
Sure, could you please provide your name to check your reservation status?
My previous reservation has done with my name James Williams.
Ok, please wait a moment I will check your complete reservation details and proceed further.
Sure, take your own time.
Sorry to say, there is no reservation on your name in my database.
Ok, not an issue. May be something went wrong while booking the ticket. Thank you for providing information.
Than you for choosing us, have a nice day.