Hello, I am Mark Clark.
user
Hello, how can I assist you?
assistant
I made a reservation earlier to go to holiday trip with my friends, due to some problems I want change my reservation. Can you please help me in changing?
user
Sure, I will help you. Please wait a moment.
assistant
Ok.
user
Sorry, there is no reservation found on your name.
assistant
Ok, thank you for your information.
user
Thank you for choosing us.
assistant