You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I aid you?

USER: I want to book a flight ticket from PHL to BOS. Could you help me?

ASSISTANT: Sure, may I know your travel dates please?

USER: My travelling dates are from Oct 29 - 31.

ASSISTANT: Can you please share your name?

USER: Dorothy Green.

ASSISTANT: Is there any connection limit?

USER: I prefer for direct flight.

ASSISTANT: Do you have any other specifications?

USER: No.

ASSISTANT: Dorothy Green, there are no flights available in your route.

USER: That's ok, no problem. Thank you.

ASSISTANT: Thank you for reaching us.