You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I best support you today?

USER: As I am a writer I want to visit Boston public library to search historical books. I want to leave between 12/06 and 12/08. Do you have any seats available in a flight on these dates from Boston?

ASSISTANT: Sure, I will search a flight for you. How much money you can afford in booking a ticket?

USER: As my budget is low I can spend 200 for a ticket.

ASSISTANT: Do you need any break in between journey?

USER: Yes, I need a halt in between my journey.

ASSISTANT: Can you please let me know your exact source and destination airport codes?

USER: I planned to board at my nearest airport which is coded as DEN. My landing point is BOS.

ASSISTANT: Ok, please wait for a while, I will check and get back to you with flight details.

USER: Sure, I will wait. You can book a ticket with my name Amanda Edwards.

ASSISTANT: Ok, thanks for your patience. Unfortunately, we didn't find any flight on your journey dates.

USER: That's not a problem. I will find another option.

ASSISTANT: Thanks for choosing us. Wish you a great day.

USER: Thanks for your prompt response.