You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I help you?

USER: Can you please book a flight ticket from DCA to ORD?

ASSISTANT: Sure, can I know your travelling dates?

USER: My trip dates are 02/20 and 02/22.

ASSISTANT: On which name should I reserve the flight ticket?

USER: My name is Emma White.

ASSISTANT: Do you have any connection limit?

USER: I am comfortable to travel on a single connecting flight.

ASSISTANT: Do you have any other specifications?

USER: I need to depart with an afternoon flight.

ASSISTANT: We found Delta airline with price 100 and economy class and airline number is 1028 with arrival time is 12:00 hours and departure time is 12:00 hours, Shall I proceed for booking?

USER: Yes, proceed for booking.

ASSISTANT: Your ticket is booked.

USER: Thank you for your help.

ASSISTANT: Thank you for reaching us.