Hi.
user
Hello. How can I help you?
assistant
Due to severe health issue, I want to change my trip dates. Can you please help me in changing my existing reservation?
user
May I know your name?
assistant
My name is Jack Lee.
user
Sorry, no reservation found with your name to change your reservation.
assistant
That's ok, thank you for your information.
user
Thank you for opting us.
assistant