You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, How can I serve you?

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

ASSISTANT: Sure, May I know the travelling dates?

USER: My travel dates are Feb 19 and Feb 21.

ASSISTANT: Do you have any connection limit?

USER: I need a single connection flight.

ASSISTANT: Is there any other requirements?

USER: No.

ASSISTANT: May I know your name?

USER: Amy Edwards. Sorry, I prefer to travel in economy class.

ASSISTANT: Sorry, No flights found with your chosen dates.

USER: Not an issue, thank you for the information.

ASSISTANT: Thank you for opting us.