You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I render you at this moment?

USER: I am planning to attend a Hockey competition in Oakland OAK from DFW. Can you find a flight ticket for me?

ASSISTANT: Sure, do you need any lay by in between the journey?

USER: Yes, I need a direct flight to travel.

ASSISTANT: Ok, may I know your class preference?

USER: No. I don't have any other class preference.

ASSISTANT: Ok, could you please provide your preferred travelling dates?

USER: Ok, my planned trip dates are on Sept 12 and return on Sept 14.

ASSISTANT: Do you have any other requirements?

USER: NO.

ASSISTANT: May I have your good name please?

USER: Ok, I am Jeffry Brown.

ASSISTANT: There are no flights found on your requested dates.

USER: Ok, not an problem.

ASSISTANT: Thank you for reaching us.

USER: Thank you for your help.