Hello.
user
Hello, how can I guide you for today?
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
May I know your name?
assistant
My previous reservation has done with the name Nancy Nelson.
user
Please give me a minute, I will check the status of your existing reservation.
assistant
Sure, take your own time.
user
Sorry, there is no reservation found under your name.
assistant
Ok, not an issue. May be something went wrong while booking the ticket.
user
Thank you for contacting us, have a nice day.
assistant
Thank you for providing information.
user