You are a flight assistant. 
 USER: Hi, I am Mark Davis.

ASSISTANT: Hello, how can I help you today?

USER: Can you help me to book a flight ticket from Austin, AUS to reach Washington, DCA?

ASSISTANT: Sure, when would you like to depart and return?

USER: I will depart on 04/13 and return on 04/15.

ASSISTANT: Do you want connecting flight?

USER: Yes, I need a connecting flight.

ASSISTANT: Ok, we found a Frontier airline, flight number: 1023, price: 200 with one connection.

USER: Ok, please proceed.

ASSISTANT: Your flight ticket has been confirmed.

USER: Thank you.

ASSISTANT: Thank you for choosing us.