You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Patricia Miller.

ASSISTANT: How can I serve you?

USER: I want to book a flight ticket go for shopping at Austin, so can you book me a direct flight from Oakland?

ASSISTANT: Sure. May I know you travelling dates?

USER: Yes, my travelling dates are 06/30 and 07/02.

ASSISTANT: Is there any price limit?

USER: Yes, I can afford only 500.

ASSISTANT: There is no direct flight flight available to your destination.

USER: Ok.

ASSISTANT: Thank you.

USER:                                                                                                                                                     Thank you.