Hello,.
user
Hello, how may I help you?
assistant
I am Margaret Lee. Due to my sports event has been preponed, I would like to change my existing reservation. Can you please help me with that?
user
Sure, please stand by I will revert you.
assistant
Ok.
user
Thank you, sorry no reservation found with your name.
assistant
Thank you for your kind service.
user
Have a nice day.
assistant