You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I aid you?

USER: I am Virginia Edwards. I want to book a flight ticket from DEN to LGA. Can you please help me out?

ASSISTANT: Sure, can you share your trip dates?

USER: My trip dates are June 02 and June 04.

ASSISTANT: Do you have any preferences?

USER: I need my depart flight ticket at evening time.

ASSISTANT: Sorry, there is no flight on your given dates.

USER: I want connecting flight in between my journey. Can you please recheck with that?

ASSISTANT: On your request, I have rechecked. Sorry, there is no flight on your given dates.

USER: Ok, fine thank you for your information.

ASSISTANT: Thank you for reaching us.