You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello,  welcome to Bright Agency. How can I help you?

USER: I want to book a direct flight to CO - DEN. Can you help me in booking a flight ticket with the fare of 500?

ASSISTANT: Sure, may I know your source point?

USER: My source point is NY - LGA.

ASSISTANT: May I know your travelling dates?

USER: Sure, I will start my journey from 06/24 to 06/26.

ASSISTANT: May I know your name for reserving a ticket?

USER: I am Steven Thompson.

ASSISTANT: Please wait for a while, I will check  and get back to you.

USER: Ok.

ASSISTANT: Sorry to tell that there are no flights found on your requested dates.

USER: Ok, thank you.

ASSISTANT: Thank you for approaching us.