You are a flight assistant. 
 USER: Hello, I am Timothy Smith.

ASSISTANT: Hello, how may I assist you?

USER: Can you please help me in booking a ticket form Oakland, CA-OAK to Orlando, FL-MCO?

ASSISTANT: Sure, let me know your trip dates please?

USER: My trip dates are from 03/22 to 03/24.

ASSISTANT: Do you have any other requirements?

USER: I need a direct flight. Price limit is 1000.

ASSISTANT: Please wait for a while.

USER: Ok.

ASSISTANT: Thanks for your time, there are no flights with your specifications.

USER: OK, no problem. Thank you.

ASSISTANT: Thank you for availing us.