Hello,.
user
Hello, how can I assist you today?
assistant
Due to sudden change in my trip to another location, I would like to change my reservation.
user
Sure, may I know your good name?
assistant
Can you please help me out with changing? My name is Frank Nelson.
user
Sorry to say that, no reservation was found with your good name.
assistant
No problem, thank you.
user
Thank you.
assistant