You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I help you?

USER: I am Justin Lee, can you help me to book afternoon flight from MSP?

ASSISTANT: Sure, can you share your trip dates?

USER: My travelling dates are May 30 and June 01.

ASSISTANT: May I know your landing airport code?

USER: My destination airport code is DCA.

ASSISTANT: Do you have any other preferences?

USER: I need connecting flight.

ASSISTANT: Give me a minute.

USER: Ok.

ASSISTANT: There is a connecting flight with number 1001 in airline Frontier, the fare is 100 in economy class. Can I book it?

USER: Proceed with booking.

ASSISTANT: Your ticket is booked, the depart time is 16:00 PM and return time is 19:00 PM.

USER: Thank you.

ASSISTANT: Thank you for reaching us.