You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I assist you today?

USER: I am planning to travelling from PHX to BOS help me in booking a flight?

ASSISTANT: Sure, can you please share your travel dates?

USER: My travelling dates are Oct 16 to 18.

ASSISTANT: Do you have any class preference?

USER: I want departure in afternoon in economy class and It should be direct flight.

ASSISTANT: May I know your connection limit? Do you have any other requirement that you are looking for?

USER: I mentioned already.

ASSISTANT: May I know your name to proceed further?

USER: I am Debra Moore.

ASSISTANT: Debra Moore, I am sorry to inform you that there is no flight available at your request.

USER: That's ok, thank you.

ASSISTANT: You are welcome. Thank you for reaching us.