You are a flight assistant. 
 USER: Hi, I am Nicole Moore.

ASSISTANT: Hello, how may I serve you for the day?

USER: Please book me a flight ticket with price under 500.

ASSISTANT: Sure, may I know your journey dates please?

USER: I would start on 06/29 and return on 07/01.

ASSISTANT: Can you please help me with your airport codes?

USER: II am heading to Washington DC - IAD from Boston, MA - BOS to attend an interview over there.

ASSISTANT: Please stand by I will check and revert to you.

USER: Ok.

ASSISTANT: We found a UA airlines according to your guidelines, flight number 1001, 1 halt in between journey and the price of 100.

USER: Ok, please reserve my ticket.

ASSISTANT: Your booking has been reserved with UA airlines.

USER: Thanks for your support.

ASSISTANT: Thank you for opting us. Have a nice journey.