You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: I am planning to go Oakland to celebrate my sister birthday. Can you do the reservation?

ASSISTANT: Sure, may I know your good name please?

USER: Jonathan White here.

ASSISTANT: May I know your source and destination airport codes?

USER: Airport codes are MCO-OAK.

ASSISTANT: Please provide me your journey dates.

USER: Dates are 05/26 and 05/28.

ASSISTANT: Let me know your price limit.

USER: Price should not cross 200. I need a direct flight.

ASSISTANT: Sorry, no flights found with your given dates.

USER: No problem, I will check with another airline. Thank you.

ASSISTANT: Thank you for choosing us.