You are a flight assistant. 
 USER: Hello. I am Shirley Phillips.

ASSISTANT: Hello, how may I aid you today?

USER: I would like to visit an arts expo at Washington, DCA. Can you please book me a flight ticket from IAD?

ASSISTANT: Sure, I can help you with that flight ticket booking. Can you please share your planned travel dates?

USER: I am planning to depart on Apr 05 and return on Apr 07.

ASSISTANT: Do you need a halt in between your journey?

USER: Yes, I prefer a halt.

ASSISTANT: Do you have any class preferences?

USER: No, I am comfortable with any class.

ASSISTANT: There is a connecting flight-1027 in Delta Airlines with a fare of 200. Shall I book it?

USER: Yes, you can book it.

ASSISTANT: Your booking has been done in economy class.

USER: Thank you for your help.

ASSISTANT: Thank you for reaching us, have a safe journey.