You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: My name is Charles Campbell.

ASSISTANT: Charles, how can I aid you today?

USER: I have a business meeting in Austin, can you help me for booking a flight ticket from JFK to AUS?

ASSISTANT: Sure, I am here to help you. May I know your travel dates please?

USER: My travelling dates are 06/13 and 06/15.

ASSISTANT: Ok, hold on for a moment. Let me check the best flight for you.

USER: Sure, I will wait for your response.

ASSISTANT: I found a flight for you with UA airline and it costs you 700. Shall I proceed?

USER: Can you please check a flight with the budget of 200.

ASSISTANT: Sorry Campbell, there are no flights available with in your budget.

USER: That's ok, thank you for checking.

ASSISTANT: Welcome, thank you for choosing us. Have a great day.

USER: Welcome.