You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I'm Margaret Campbell.

ASSISTANT: How can I help you?

USER: I want to go on a vacation to Phoenix.Can you book a ticket from MA - BOS to AZ - PHX?

ASSISTANT: Sure Margaret, can you please give me your journey dates?

USER: I want to depart on 03/17 and return on 03/19. Make sure that connection limit is 0.

ASSISTANT: Ok, please wait for a moment.

USER: Sure, take your time.

ASSISTANT: Sorry to say Margaret, there is no flight available with 0 connection.

USER: That's Ok. Thank you for your help.

ASSISTANT: Thank you for reaching us. Welcome.