You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I aid you at this moment?

USER: I want to book a ticket from DEN to BOS, can you help me?

ASSISTANT: Sure, I am here to help you. Can you please share your journey dates?

USER: My travel dates are 10/02 and 10/04.

ASSISTANT: Do you have any class preference for this trip?

USER: I prefer business class.

ASSISTANT: May I know your connection limit preference for this trip?

USER: I need a connecting flight.

ASSISTANT: Do you have any other specifications?

USER: No.

ASSISTANT: May I know your good name please?

USER: I am Ruth Walker.

ASSISTANT: Ruth Walker, there are no flight services are available on this route on your provided dates.

USER: No problem, thanks for checking.

ASSISTANT: Thank you for contacting us.