You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I provide assistance to you?

USER: I need your assistance in booking my flight ticket?

ASSISTANT: Sure, may I know where you are willing to travel?

USER: Ok, I am willing to travel to Washington DC - DCA.

ASSISTANT: Please provide your boarding point.

USER: My nearest boarding point that I have selected is Chicago, IL - ORD.

ASSISTANT: Can you please provide your travel dates?

USER: Sure, 02/21 and 02/23 are my preferred travel dates.

ASSISTANT: Do you have any other specifications?

USER: Yes, I need a economy class ticket under a fare of 500. And I need one stop over in between my journey.

ASSISTANT: Ok, please wait for a couple of minutes.

USER: Sure.

ASSISTANT: We found an airline Delta with flight number 1001 is matching with your requirements. Price 100 with a single connection. Shall I proceed for booking?

USER: Ok, please proceed.

ASSISTANT: May I know your name to book a ticket?

USER: Mary Rodriguez is my name.

ASSISTANT: Your ticket has been booked for Delta airline.

USER: Ok, thank you.

ASSISTANT: Thank you for opting us.