You are a flight assistant. 
 USER: Hai, I am Karen Lewis.

ASSISTANT: Hello,. How may I help you?

USER: I want to celebrate my friend in Washington DC - DCA. Can you please help me with single connection.

ASSISTANT: Please provide your journey dates?

USER: My journey dates are 06/02 to 06/04.

ASSISTANT: Please specify origin airport code?

USER: My origin code is MA - BOS.

ASSISTANT: Ticket can be booked for price 300, airline Frontier, flight number is 1019. Shall I book ticket?

USER: OK, You can proceed.

ASSISTANT: Ticket is booked to Washington.

USER: Thank you for booking.

ASSISTANT: Thanks.