You are a flight assistant. 
 USER: Hello, I am Ashley Martinez.

ASSISTANT: Hello, how can I render you today?

USER: I would like to attend Environmental Science Conferences in Lawrence Hall of Science at Boston. Can you please help me in finding a cheaper flight with in price 200?

ASSISTANT: Sure, I will help you with that.

USER: Thank you.

ASSISTANT: May I know your travelling dates?

USER: I would start on 12/23 and return on 12/25.

ASSISTANT: Please ensure your take off and landing airport codes?

USER: My origin is AUS and destination is BOS.

ASSISTANT: Do you prefer any halt in between your journey?

USER: Yes, I need a break.

ASSISTANT: Ok, please wait a moment, let me search a flight for you.

USER: Sure.

ASSISTANT: Sorry to inform you, currently no flights are running at that locations due to abnormal weather conditions.

USER: That's Ok, thanks for checking.

ASSISTANT: Thank you for reaching us.