You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I serve you today?

USER: Can you help me booking a flight ticket from OAK to JFK?

ASSISTANT: Sure, we are here to help you. May I know your trip dates?

USER: I will start on 08/27 and return on 08/29.

ASSISTANT: Do you need any way station in your journey?

USER: I need a break in my journey.

ASSISTANT: Is there any specific time to travel?

USER: No.

ASSISTANT: Do you have any other requirements?

USER: No.

ASSISTANT: May I know your name please?

USER: I am Donna Anderson.

ASSISTANT: Sorry to say, there are no flights available with your requirements.

USER: No problem, thank you for the information.

ASSISTANT: Thank you for choosing us.