You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I assist you?

USER: Could you please book a flight ticket from LAS to DCA?

ASSISTANT: May I know your travel dates?

USER: My trip dates are Feb 27 and Feb 29.

ASSISTANT: Do you prefer connecting flight?

USER: I need a single connecting flight.

ASSISTANT: Do you have any other specifications?

USER: No.

ASSISTANT: May I know your good name?

USER: I am Mark Baker.

ASSISTANT: We found a flight in an economy class with direct flight in Southwest airlines and the fare of your flight will be 100. Do you like me to proceed your booking with this flight?

USER: Ok, proceed.

ASSISTANT: Your booking is done with flight number 1022.

USER: Thank you.

ASSISTANT: Thank you for reaching us.