You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello,.

USER: I am Ashley Lee.

ASSISTANT:  May I know, How can I provide assistance to you?

USER: I want to book a  flight ticket within 200. Can you help me?

ASSISTANT: Sure, I can help you in that. For that, I need your travelling airport codes. Can you provide them?

USER: BOS and DTW are my airport codes.

ASSISTANT: Ok, I need your specified dates that you wish to travel and return?

USER: 12/23 and 12/25 are my travelling dates.

ASSISTANT: We have Spirit airline of flight number 1005, with fare 100 available for your journey.

USER: You can reserve it.

ASSISTANT: Your ticket has been confirmed with this connecting flight.

USER: Thank you.

ASSISTANT: Thanks for choosing us, have a safe journey!.