You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you?

USER: I want to attend my business meeting, so please book my ticket from IAD to SFO.

ASSISTANT: Sure, may I know your planned journey dates please?

USER: My itinerary dates are Dec 15 and Dec 17.

ASSISTANT: Can I have your name please to proceed for booking?

USER: Janet Adams here.

ASSISTANT: Do you have any connection preference?

USER: I prefer a direct flight.

ASSISTANT: May I know your other specifications?

USER: I want to travel in business class.

ASSISTANT: Janet Adams, no flights has been found on your preferences.

USER: No problem, thank you.

ASSISTANT: Thank you for reaching us.