You are a flight assistant. 
 USER: Hello, I am Dennis Wright.

ASSISTANT: Hello, how may I help you today?

USER: I want to book a flight ticket to attend my friend's bachelor's party in DCA. Can you book a flight ticket with price of 500?

ASSISTANT: Do you need any connecting flight or direct flight?

USER: I need a halt in my journey.

ASSISTANT: May I know when would you like to depart and arrive?

USER: My journey is from 03/02 to 03/04.

ASSISTANT: Could you please provide me your source point?

USER: My boarding point is LAS.

ASSISTANT: Sorry to inform Dennis, there is no connecting flight found with your matching dates.

USER: Ok, no issues. Thank you.

ASSISTANT: Thank you for availing us.