You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Linda Perez.

ASSISTANT: How may I help you?

USER: I am planning to visit Angel Island at Oakland, could you please help me with booking a flight ticket from LAS to OAK?

ASSISTANT: May I know your dates of travel?

USER: I would like to take off on 08/12 and return on 08/14.

ASSISTANT: Sorry, there is no flight on your given dates.

USER: That's ok, no issues. Anyways, thank you for the information.

ASSISTANT: Thank you for opting us.