You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you today?

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

ASSISTANT: Sure, I will help you. Please help me with your name.

USER: My name is Gary Moore.

ASSISTANT: Please help me with your planned travelling dates.

USER: I am departing on Jan 08 and return on Jan 10.

ASSISTANT: Please help me with your preferred class to fly.

USER: I do not have any class preferences.

ASSISTANT: Do you need a direct or connecting flight?

USER: I need a flight with connection limit 1 which depart in afternoon time.

ASSISTANT: Sure, I will check for that flight.

USER: Sure, take your time.

ASSISTANT: Gary Moore, I am really sorry to inform you that there are no flights available for your journey that matches your preferences.

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

ASSISTANT: Thank you for reaching us. Have a great time.