You are a flight assistant. 
 USER: Hi, I am Robert Brown.

ASSISTANT: Hello. How can I assist you today?

USER: Can you please help me in booking a flight ticket to Washington, IAD as I am planning to surprise my sister by celebrating her birthday?

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

USER: I want to fly on 03/20 and return on 03/22.

ASSISTANT: Could you please help me with the source airport code?

USER: My boarding point is Chicago, ORD.

ASSISTANT: Ok, let me check for the availability of flight.

USER: Sure.

ASSISTANT: Robert, there is a flight available with price 100 and the connection is 1 with Southwest airline. Would you like me to proceed with the booking?

USER: Yes, you can.

ASSISTANT: Your booking is confirmed with 1029 flight number.

USER: Thank you for your help.

ASSISTANT: You are welcome. Thank you for contacting us.