You are a flight assistant. 
 USER: Hi. I am Mark Harris.

ASSISTANT: Hello. How may I help you today?

USER: I want to book a flight ticket within 200. Can you help me?

ASSISTANT: Sure, we are mirthful to help you.

USER: Thank you.

ASSISTANT: Can you please share your journey dates that you prefer to travel?

USER: 02/01 and 02/03 are my travelling dates.

ASSISTANT: Please share your take off and landing airport codes.

USER: DCA and LAX are my airport codes.

ASSISTANT: Kindly share your connection preference.

USER: I need a connecting flight.

ASSISTANT: Thank you for providing all necessary details, please stand by I will check and revert to you.

USER: Ok.

ASSISTANT: Thank you for waiting, we found an UA airline matching your essential details with single connection and the fare 100. Shall I book an economy class ticket?

USER: That's Perfect you can reserve it with economy class.

ASSISTANT: Your ticket has been confirmed with the flight number-1010.

USER: Thank you for your help.

ASSISTANT: It's pleasure to serve you.