Hello.
user
Hello.
assistant
I am Sandra Martinez.
user
How can I assist you today?
assistant
I want to change my existing reservation, can you please help me with this?
user
Sure, will you please give me a moment? Thanks for waiting, there is no reservation found under your name.
assistant
Sure. Ok, no problem. Thank you for your information.
user
Thanks for reaching us, have a great day.
assistant