You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello,.

USER: I am Mark Jones.

ASSISTANT: How may I help you?

USER: I want to book a ticket to participate in badminton at Charlotte, CLT. Can you book a direct flight?

ASSISTANT: Sure, may I know your scheduled travel dates please?

USER: Travelling dates are on 10/04 and 10/06.

ASSISTANT: Can I know your source airport code?

USER: My source point is OAK.

ASSISTANT: How much you can afford for a flight ticket?

USER: I can afford up to 5000.

ASSISTANT: Please hold on, I will let you know the flight details.

USER: Sure.

ASSISTANT: Thanks for your time, there were no flights found with your given preferences.

USER: Ok, thank you for providing information.

ASSISTANT: Thanks for reaching us.