You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: Can you please book a flight ticket from BOS to OAK?

ASSISTANT: Sure, let me know your travel dates.

USER: My travel dates are Oct 15 and Oct 17.

ASSISTANT: May I know your name?

USER: My name is Mark King.

ASSISTANT: Do you have any class preference?

USER: No, I am comfortable with any class.

ASSISTANT: Do you have any connection limit preference for this trip?

USER: Yes, I need a break in between the journey.

ASSISTANT: Do you have any other preferences?

USER: No.

ASSISTANT: Sorry, we did not find any flights for you.

USER: That's ok, thank you for the response.

ASSISTANT: Thank you for reaching us.