Hi.
user
Hello, how may I serve you today?
assistant
Due to some emergency work, I want to change my existing reservation.
user
May I know your name please?
assistant
I am Margaret Brown.
user
Thank you for providing name.
assistant
Will you help me in this ticket booking?
user
Unfortunately, there are no reservation found.
assistant
Ok, thank you for your information.
user
Thank you for choosing us.
assistant