You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello. How can I help you?

USER: I am Kevin Lee. I need to book a flight ticket.

ASSISTANT: what dates will you be travelling?

USER: I want to depart on Mar/22 and return on Mar/24.

ASSISTANT: May I know your source and  destination ?

USER: I want to book a ticket from Washington DC-DCA to Austin TX-AUS.

ASSISTANT: One moment please. Yes there is a flight available according to your details. flight number;1024 and flight name; Frontier. price.

USER: price limit 200 with single connection.

ASSISTANT: Yes there is a flight.Can I proceed  with further formalities?

USER: Yes, You can proceed with the booking.

ASSISTANT: Your booking is done.

USER: Thank you.

ASSISTANT: Thank you, Have a safe journey.