You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you?

USER: Shirley Clark here. I would like to meet my grandparents in Washington, can you please reserve a flight ticket from ORD to IAD?

ASSISTANT: Sure, may I know your travel dates?

USER: Ok, my departure is on Jan 31 and please book my return ticket also on Feb 02.

ASSISTANT: Do you prefer economy or business class?

USER: I don't have any class preference.

ASSISTANT: At what time do you like to leave?

USER: I would like to departure in afternoon time.

ASSISTANT: We found a flight on your details with Delta Airline, flight number: 1028. Shall I book this ticket?

USER: Is it single connected flight?

ASSISTANT: Yes, it is connecting flight.

USER: Ok, you can proceed with booking now.

ASSISTANT: Ok. Your ticket has been booked.

USER: Thank you for your assistance.

ASSISTANT: Thank you.