Hello.
Hello, how can I guide you for today?
Due to change in my plans to visit Dallas, I would like to change my existing reservation. Can you help me with this?
Sure, can you please provide your name?
My previous reservation has done with my name William Turner.
Please give me a minute, I will find your existing reservation.
Sure.
Sorry, there is no reservation found under your name.
Ok, not an issue. May be my friend has already changed my reservation. Thank you for providing information.
Thank you for availing us.