You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I assist you today?

USER: I am Barbara Lopez. I need to book a flight ticket from DCA to ORD, Can you please help me with that?

ASSISTANT: Sure, can you please share your travel dates?

USER: I would like to travel on 03/13 to 03/15.

ASSISTANT: Do you have any class preference?

USER: I am comfortable with any class.

ASSISTANT: Barbara Lopez, there is a flight available with price 100 and the connection is 1 with United Airline. Would you like me to proceed with the booking?

USER: Ok, proceed for booking.

ASSISTANT: Your booking is confirmed with 1015 flight number and the departure time is 6:00 AM, arrival time is 21:00 PM.

USER: Thanks for your information.

ASSISTANT: You are welcome.