Hi.
user
Hello, how may I serve you today?
assistant
I want to book a flight ticket from Washington, can you please book a ticket in business class?
user
Sure, may I know your travelling dates?
assistant
My travelling dates are Oct 13 and Oct 15.
user
May I know your connection limit?
assistant
    I need a connecting flight.
user
Which class do you prefer?
assistant
    I have mentioned above.
user
At what time do you travel?
assistant
I want to depart at evening.
user
Can I know your airport codes?
assistant
My airport codes are IAD and ATL.
user
May I know your name?
assistant
        My name is Melissa Gonzalez.
user
There are no flights available.
assistant
That's ok, thank you for the response.
user
Thank you for choosing us.
assistant