You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: I am Justin Lewis, can you help me to find a flight to Oakland, OAK?

ASSISTANT: Sure, I will help you. May I know your take off airport code?

USER: My boarding point is at DFW.

ASSISTANT: Let me know your planned journey dates.

USER: My travelling dates are on 02/23 and 02/25.

ASSISTANT: Do you have any other requirements?

USER: Yes, I need a direct flight.

ASSISTANT: Give me a minute, I will check and let you know the flight availability.

USER: Sure.

ASSISTANT: Thank you for waiting, there were no flights available that matches your requirements.

USER: Ok, thank you.

ASSISTANT: Thank you for approaching us.