Hello. Myself Brenda Clark.
user
Hello, how may I assist you?
assistant
There is a art exhibition in Los angles, so I want to  book a ticket from CLT to LAX.
user
Ok, when would you like to travel?
assistant
I would like to travel on 12/19 to 12/21.
user
Sorry Brenda, there is no flights available for your request.
assistant
That's fine, thank you for your service.
user
Thank you for using our service, have a nice day.
assistant