You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I assist you?

USER: I am Dennis Garcia, can you help me to book a flight on Apr 12 and Apr 14?

ASSISTANT: Sure, can I know the airport codes please?

USER: My preferred airport codes are MSP and DCA.

ASSISTANT: Ok, wait a moment please.

USER: I need a connecting flight.

ASSISTANT: There is a connecting flight in Frontier airline with price 200, can I book it?

USER: Proceed with booking.

ASSISTANT: Your ticket has been booked with flight number 1017.

USER: Thank you.

ASSISTANT: Thank you for approaching us.