You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I guide you?

USER: I would like to book a ticket from BOS to DTW, can you please help me out?

ASSISTANT: Sure, I am happy to help you. Can I know your journey dates?

USER: I am travelling on these dates July 7th and 9th.

ASSISTANT: Ok, do you have any preference about the connection limit?

USER: I need single connected flight.

ASSISTANT: Ok, please share your other preferences.

USER: I prefer business class.

ASSISTANT: May I know your full name please?

USER: Ryan Miller here.

ASSISTANT: I am really sorry to inform you that, there are no flights found in this route with the dates you have given.

USER: Ok no problem, thank you for your services.

ASSISTANT: Thank you for opting us.