You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, How can I assist you?

USER: I want to reserve my flight from BOS to reach LAS, can you please help me out with it?

ASSISTANT: Sure, May I know the travelling dates?

USER: Sure, my journey dates are Feb 22nd and Feb 24th.

ASSISTANT: Do you have any connection limit?

USER: I prefer to travel in a single connecting flight.

ASSISTANT: Is there any other requirements?

USER: I don't have any more requirements.

ASSISTANT: May I know your name?

USER: My name is Patrick King.

ASSISTANT: Please wait a moment.

USER: Ok, sure.

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

USER: That's ok. Thank you for opting us.

ASSISTANT: Thank you for availing us.