You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you today?

USER: Can you please help me in booking the flight ticket from DCA to ORD?

ASSISTANT: Sure, please share me your trip dates.

USER: My travel dates are Apr 18 and Apr 20.

ASSISTANT:  Do you need direct flight or connecting flight?

USER: I need a single connection.

ASSISTANT: May I know your airlines specifications?

USER: I am comfortable with any airlines.

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

USER: Katherine Thompson.

ASSISTANT: We found a Frontier airline and 1009 is flight number with a fare of 100. Shall I proceed?

USER: Please proceed.

ASSISTANT: Your ticket is confirmed with an economy class.

USER: Thank you for the help.

ASSISTANT: Thank you for opting us.