You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: My name is Lisa Davis.

ASSISTANT: How may I assist you?

USER: I would like to spend my weekend at Oakland, could you please help me in booking a ticket from LAX to OAK?

ASSISTANT: Sure, may I know your travelling dates please?

USER: My planned travel dates are 09/27 and 09/29.

ASSISTANT: Wait a moment please.

USER: Sure, take your time.

ASSISTANT: Lisa Davis, there are no flights available in you route.

USER: Ok, no problem. Thank you for your information.