You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I assist you today?

USER: Please help me to book a flight ticket from BOS to treat an emergency case in DCA.

ASSISTANT: Sure, may I know your planned travel dates?

USER: Sure, I am planning to start on 10/18 and my return date will be on 10/20.

ASSISTANT: Let me know your connection limit.

USER: I prefer to fly in a connecting flight for this time.

ASSISTANT: Do you have any other requirements?

USER: no.

ASSISTANT: May I know your name please?

USER:  I am Katherine Martin.

ASSISTANT: We found a Frontier airline, flight number: 1028, price: 100 with one connection.

USER: That's fine, please proceed with the booking.

ASSISTANT: Your flight ticket has been reserved.

USER: Thank you for your assistance in booking.

ASSISTANT: Thank you for choosing us.