You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: I am planning to attend a Tennis competition in Dallas DFW from DCA. Can you find a flight ticket for me?

ASSISTANT: Sure, may I know your name?

USER: Ok, my name is Karen Adams.

ASSISTANT: Can I know your travelling dates?

USER: Ok, my planned trip dates are on Aug 16 and return on Aug 18.

ASSISTANT: Do you need a connecting flight?

USER: I need a single connecting flight.

ASSISTANT: May I know your other preferences?

USER: Yes, I want a business class flight.

ASSISTANT: Wait a minute.

USER: Sure, I will.

ASSISTANT: There is a flight of frontier airline, flight number 1004 with the fare of 500. Can I proceed?

USER: Ok, you can proceed with the ticket booking.

ASSISTANT: Your ticket has been booked in business class.

USER: Thank you for your help.

ASSISTANT: Thank you for choosing us.