You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I help you?

USER: I want to exhibit my arts in an exhibition at Washington DC- IAD. Help me with booking the flight ticket.

ASSISTANT: Sure, please provide me your source airport code.

USER: My source is from Boston, MA - BOS.

ASSISTANT: Ok, do you need any flag stop in between your journey?

USER: Yes, I need a flag stop in my journey.

ASSISTANT: Ok, what are your journey dates?

USER: I want to fly on 09/26 and recur on 09/28.

ASSISTANT: Ok, please wait a moment.

USER: Sure.

ASSISTANT: We have a flight at a price 300 in Frontier airline from flight number 1009. Shall I proceed?

USER: Please proceed.

ASSISTANT: I need your name to proceed further.

USER: Sure, I am Emma Harris.

ASSISTANT: Your reservation has been done.

USER: Thanks for your kind assistance.

ASSISTANT: Thank you for choosing our service.