You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I support you now?

USER: I am Linda Johnson, I have planned to surprise my friend on this Valentine's day. So I want to book a flight ticket on 02/13.

ASSISTANT: Sure, please share me your airport code?

USER: Sure, my origin point is Chicago, IL - ORD and destination is Washington DC - IAD.

ASSISTANT: May I Know your return date?

USER: I should return on 02/15.

ASSISTANT: Please wait for a while.

USER: OK.

ASSISTANT: Thank you for waiting, there is a flight of airline UA and flight number is 1015. Price is 100 with one connection limit. Shall I proceed with booking?

USER: Yes, please proceed.

ASSISTANT: Ok. Your ticket has been booked on airline UA.

USER: Thanks for your help, you made my job easy.

ASSISTANT: Thank you, have a nice journey.