You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I aid you today?

USER: I need to book a flight ticket from DCA to LAX, can you help me in booking a flight ticket?

ASSISTANT: Sure, please share me your trip dates.

USER: Sure, my journey dates are Feb 20 and Feb 22.

ASSISTANT: Do you need direct flight or connecting flight?

USER: I prefer maximum one connection.

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

USER: Sure, Raymond Lewis here.

ASSISTANT: May I know your class preferences?

USER: I am comfortable with any class.

ASSISTANT: We found a UA airline and 1011 is flight number with a fare of 100. Shall I proceed?

USER: Yes, you can.

ASSISTANT: Your ticket is confirmed with an economy class.

USER: Thank you.

ASSISTANT: Thank you for opting us.