You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you today?

USER: I am looking to book a flight ticket from DTW to BOS. Can you help me for that?

ASSISTANT: May I know your travelling dates?

USER: My travelling dates are Nov 22 and Nov 24.

ASSISTANT: May I know your name?

USER: My name is William Hall.

ASSISTANT: Do you need any connection limit?

USER: I prefer to book a single connecting flight.

ASSISTANT: Any other specifications to be met?

USER: My return time is morning.

ASSISTANT: Sorry, there are no flight tickets available on your journey dates.

USER: That's ok, thank you for checking.

ASSISTANT: Thank you for reaching our service.