You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: I would like to travel from ORD to OAK as a business trip. Can you do the reservation?

ASSISTANT: Sure. Your good name please?

USER: Ryan Anderson here.

ASSISTANT: When would you like me to book your flight ticket?

USER: My trip dates are 09/02 and 09/04.

ASSISTANT: Do you have any other specifications?

USER: I need only direct flight.

ASSISTANT: Thank you for sharing the details. There were no flights available that matches your requirements.

USER: No problem, Thanks for the information.

ASSISTANT: Thank you for approaching us.