You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I aid you?

USER: I want to book a flight ticket from Chicago, IL-ORD to visit Flower festival, can you help me to book a round trip?

ASSISTANT: Sure, I can help you.

USER: I am Brenda Brown.

ASSISTANT: Can I know your travelling dates?

USER: I will depart on 02/14 and I intend to return on 02/16.

ASSISTANT: May I know your airport codes?

USER: I already mentioned above.

ASSISTANT: Ok. We found a UA airline, flight number:1006 and the price is 100.

USER: That's good, you can book the ticket.

ASSISTANT: Your flight ticket has been reserved.

USER: Thanks for your assistance.

ASSISTANT: Thank you for choosing us.