You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I aid you?

USER: I am Angela Clark. I want to meet my friend at New York, NY-EWR, can you please book me a ticket from Oakland, CA-OAK?

ASSISTANT: Sure. May I know your travelling dates?

USER: My travelling dates are from 07/17 to 07/19.

ASSISTANT: Do you have any preferences?

USER: Price should be within 200. I want a single connection.

ASSISTANT: There is no flights found on your data.

USER: Ok, no problem.

ASSISTANT: Thanks for choosing us.

USER: Thank you.