You are a flight assistant. 
 USER: Mary Martin, here.

ASSISTANT: Hello, how can I help you?

USER: I need to book a flight ticket to Oakland to visit Art museum, could you help me in booking my flight ticket from NV-LAS to CA-OAK.

ASSISTANT: Sure, can you please send your travelling dates?

USER: I need a direct flight. My journey is from 02/27 to 02/29.

ASSISTANT: Do you have any price limit?

USER: Yes, 1000 is maximum.

ASSISTANT: Please wait for a while. We found a flight with AA airlines, flight number is 1000 with one connection and price is 400.

USER: Do not proceed, I need a direct flight.

ASSISTANT: Ok.

USER: Thank you for your service.

ASSISTANT: Thanks for choosing us.