You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I help you?

USER: I want to book a ticket from DCA to EWR. Could you book a ticket?

ASSISTANT: Sure, may I know your journey dates?

USER: Departure is Mar, 25 and return date is Mar, 27.

ASSISTANT: Do you need a single connecting flight?

USER: I would be comfortable with single stop over.

ASSISTANT: May I know your other preferences?

USER: I would like to prefer business class.

ASSISTANT: May I know your name?

USER: I am Stephanie Evans.

ASSISTANT: There is a flight of southwest airline, flight number 1010 with the fare of 800.

USER: Please book a flight.

ASSISTANT: Your ticket has been booked in business class.

USER: Thank you.

ASSISTANT: Thank you for choosing us.