You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you today?

USER: Can you please help me to book a flight ticket from DTW to SFO?

ASSISTANT: Sure, please share me your trip dates.

USER: My travelling dates are June 9 to June 11.

ASSISTANT: Is there any class preferences for you?

USER: No.

ASSISTANT: Is there any time concern for you?

USER: I want to return in the evening.

ASSISTANT: Do you need direct flight or connecting flight?

USER: I need a connecting flight.

ASSISTANT: For booking, we need your good name. Please mention it.

USER: Janet Robinson here.

ASSISTANT: We found a Delta airline and 1006 is flight number with a fare of 200. Shall I proceed?

USER: Ok, please proceed to book.

ASSISTANT: Your ticket is confirmed with an economy class.

USER: Thank you.

ASSISTANT: Thank you for opting us.