You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I help you?

USER: I am planning to go for Los Angeles, CA-LAX, can you please search a flight ticket for me/.

ASSISTANT: Sure, may I know your travelling dates?

USER: My trip dates are 02/19 and 02/21.

ASSISTANT: Ok, can you please share your source airport code?

USER: My journey start from airport code is DC- IAD.

ASSISTANT: May I know your good name please?

USER: Myself Amy Moore.

ASSISTANT: Sorry for the inconvenience, there is no flight available on your requested dates in this route.

USER: Ok, fine not an issue. Thank you for your help.

ASSISTANT: Most welcome.