You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I aid you?

USER: Can you please help me to book a flight ticket from LGA to JFK?

ASSISTANT: May I know your planned trip dates?

USER: My travelling dates are July 21 to July 23.

ASSISTANT: Do you have any connection limit preference?

USER: No.

ASSISTANT: Do you have any specific time concern?

USER: I want to depart in the evening.

ASSISTANT: Do you have any other specifications?

USER: No.

ASSISTANT: Could you help me with your name please?

USER: My name is Laura Wilson.

ASSISTANT: Thank you for sharing all the necessary details. Sorry, there are no evening flights available for the given dates.

USER: No problem, thanks for your information.

ASSISTANT: Thank you for reaching us.