You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you today?

USER: Please book a flight with a fare of 5000 to New York.

ASSISTANT: Sure, please help me with your travelling dates?

USER: My friend's engagement is planned on 02/19, so I have to be there on 02/18 to meet all my friends in that function.

ASSISTANT: Sure, please help me with your airport codes?

USER: Later I will return on 02/20. Airport codes are Washington, DCA to New York, LGA.

ASSISTANT: Ok, let me know your connection limit?

USER: I need a stop over in between my journey.

ASSISTANT: Ok, please wait for a while.

USER: Sure.

ASSISTANT: For proceeding further, can I have your name please?

USER: I am Michelle Hill.

ASSISTANT: Thanks for your name, we have not found any flights with your requested details.

USER: Ok. Thanks for the quick response.

ASSISTANT: Thanks for choosing us.