You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

USER: I would like to meet my best friend, can you help me to book a flight ticket from DCA to LGA?

ASSISTANT: May I know your travel dates?

USER: My journey dates are Mar 16 to 18.

ASSISTANT: Do you have any connecting flight preferences?

USER: I prefer connecting flight.

ASSISTANT: Is there any other concern?

USER: No.

ASSISTANT: May I know your name please?

USER: I am Brian Martin.

ASSISTANT: United Airlines is providing the connecting flight and the fare of 100, shall I proceed?

USER: Ok, please proceed.

ASSISTANT: Your reservation is confirmed for the flight 1015.

USER: Thank you.

ASSISTANT: Thank you for choosing us.