You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. May I know your good name please?

USER: I am Sarah Johnson. Could you please book a flight ticket from NY-LGA to PA-PHL?

ASSISTANT: Yes, I can help you in booking your flight ticket. Please provide the travelling dates?

USER: My departure day is 05/28 and return day is 05/30. I need 1 connection limit and price range is 200.

ASSISTANT: Sorry to inform you that there are no flights available which matches with your details.

USER: Thank you for your service.

ASSISTANT: Thank you for choosing us.Have a good day.