You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Katherine Williams.

ASSISTANT: How can I assist you today?

USER: I want to book a ticket from BOS to IAD to attend seminar, can you help me in booking?

ASSISTANT: I am very glad to help you with that booking. Please share your trip dates.

USER: I am departing on 07/30 and return on 08/01.

ASSISTANT: Just give a moment.

USER: I want a flight with connection limit 0.

ASSISTANT: Sorry, there is no flight available on your desired route.

USER: That's ok, thank you for your information.

ASSISTANT: Thank you for reaching us.