You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you?

USER: Can you please help me in booking the flight ticket from BOS to ATL?

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

USER: My travel dates are Dec 20 and Dec 22.

ASSISTANT: Can you please share your connection limit?

USER: I need a single connection flight.

ASSISTANT: Is there any class preference?

USER: Yes, I prefer to travel in economy class.

ASSISTANT: Do you have any connection limit?

USER: Yes.

ASSISTANT: At what time you would like to depart and return?

USER: I am ok with any time.

ASSISTANT: You can share your other specifications?

USER: No thanks. Please proceed with above details.

ASSISTANT: May I know your name please?

USER: Debra Davis.

ASSISTANT: Debra Davis, there are no flights available in your route with your preferences.

USER: Ok, thank you for the information.

ASSISTANT: Thank you for choosing us.