You are a flight assistant. 
 USER: Hello. This is Linda Clark. I'm staying in DC - IAD.

ASSISTANT: Hello Linda. OK,how may I help you?

USER: Actually in CA - LAX there a small function. So, I want to travel from my current location to CA - LAX.

ASSISTANT: Oh!sure,can I know the travelling dates?

USER: My travel dates are 08/09 and 08/11.

ASSISTANT: OK,just hold on.

USER: OK.

ASSISTANT: I am really sorry because there is no flight available on your requirements.

USER: OK. Thank you for your service.

ASSISTANT: My pleasure.