You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I assist you?

USER: Can you please help me in booking a flight ticket to BOS from IAD?

ASSISTANT: Sure, I am here to help you out. May I know your travel dates please?

USER: My travel dates are from Aug 22 to Aug 24.

ASSISTANT: Can you please share your connection limit?

USER: I need a connecting flight.

ASSISTANT: May I know your name please?

USER: I am Jeffrey Young.

ASSISTANT: Do you have any other specifications?

USER: No.

ASSISTANT: Jeffrey Young, there are no flights available in your route with your preferences.

USER: Ok, no problem. Thank you.

ASSISTANT: Thank you for choosing us.