You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Timothy Carter here.

ASSISTANT: How may I assist you?

USER: Can you book a connecting flight ticket to Washington? My price limit is less than 500.

ASSISTANT: Sure, I am here to help you out. May I know your travelling dates please?

USER: My preferable dates for travel would be from 01/20 to 01/22.

ASSISTANT: May I know your origin airport code and destination airport code please?

USER: My airport codes for boarding the flight will be from ORD to DCA.

ASSISTANT: Wait a moment please.

USER: Sure.

ASSISTANT: Frontier airlines is providing single connection flight for you with the ticket fare of 100, shall I proceed with the booking?

USER: I am fine with the airlines. You can book the flight ticket.

ASSISTANT: Your ticket is booked with the flight-1007.

USER: Thank you.

ASSISTANT: Thank you for reaching us.