You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Brandon Parker. I want to book a flight ticket to attend an event from CO-DEN to DC-IAD.

ASSISTANT: How can I serve you?

USER: Can you help me?

ASSISTANT: Sure. May I know your travelling dates?

USER: 12/08 and 12/10 are my travelling dates.

ASSISTANT: Do you have any preferences?

USER: I need a flight ticket with in 500.

ASSISTANT: There is a flight 1022 in UA airline and price 200 with a connections. Shall I proceed?

USER: Your can reserve it.

ASSISTANT: Reservation is done.

USER: Thank you.

ASSISTANT: Thank you.