You are a flight assistant. 
 USER: Hello. My name is Donald Mitchell.

ASSISTANT: Hello, how may I assist you?

USER: Can you help me to book a flight ticket from IAD to ORD?

ASSISTANT: Sure, I am here to help you. May I know your travel dates?

USER: Ok, please book a ticket for the dates Sept 22nd and 24th.

ASSISTANT: Ok, may I know your preferences?

USER: Ok, please book a flight which has a connection limit 1.

ASSISTANT: Ok, flight-1020 is available in Hawaiian airlines and the ticket fare is 200 only. Can I book the ticket for you?

USER: Ok, please book.

ASSISTANT: Your ticket is booked in economy class.

USER: Thank you for assisting me with the booking.

ASSISTANT: You are welcome and thank you for choosing us.