Hello, my name is Jack Williams.
user
Hello, how may I serve you today?
assistant
As my holidays got extended, I want to change my existing reservation. Can you help me out?
user
Sure, I am here to help you. Please stand by I will revert you.
assistant
Ok.
user
Thank you, sorry no reservation found with your name.
assistant
Ok fine, thank you.
user
Thank you for contacting us, have a nice day.
assistant