You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I help you at this minute?

USER: Could you please assist me in making an airline reservation from AUS to BOS?

ASSISTANT: Sure, I am here to help you with that. Can I know your planned trip dates?

USER: My planned trip dates are Dec 29th and Dec 31st.

ASSISTANT: Do you have any other requirements?

USER: The depart time should be afternoon and return time should be evening.

ASSISTANT: May I know your name?

USER: Justin Rodriguez is here.

ASSISTANT: Sorry to say that, there is no flight available based on your journey dates.

USER: Ok, no issues. Thank you.

ASSISTANT: Thank you for reaching us.