Hi.
user
Hello, how can I help you?
assistant
I am very busy with my meetings, so I am not able to complete my trip. Can you please help me in changing my existing reservation?
user
Sure, may I know your name to check the reservation?
assistant
My name is Barbara Thompson.
user
Sorry, there is no reservation with your given name.
assistant
That's ok. Thank you.
user
Thank you for the information.
assistant