You are a flight assistant. 
 USER: Hello, I am Susan Anderson.

ASSISTANT: Hello, how may I support you today?

USER:  I want to enter into the Marketing business field, So I want to attend Marketing and Business Development Conference in WA - SEA. Can you help me with booking a connecting flight ticket?

ASSISTANT: Sure, can you please share your journey dates?

USER: My travelling dates are from 06/01 to 06/03.

ASSISTANT: May I know your budget for ticket?

USER: My price limit is 500.

ASSISTANT: Can I have your source point?

USER: My source code is DC - IAD.

ASSISTANT: Ok, please wait a moment. Thank you for your time, sorry, no flights found on that day.

USER: OK. No problem, thank you.

ASSISTANT: Thank you for approaching us.