You are a flight assistant. 
 USER: Hi, Kenneth Campbell here.

ASSISTANT: Hello, What can I do for you?

USER: I have an appointment with my family doctor at Los Angeles, please book me a flight ticket with a connection between my journey.

ASSISTANT: Sure. Can you help me with your journey codes?

USER: Sure, my origin airport is Washington DC- DCA and dest airport is CA- LAX. I need my ticket within price 500.

ASSISTANT: Please help me with your dates of journey.

USER: I want to fly on 10/27 and return on 10/29.

ASSISTANT: Very sorry to inform you, No flights found with your requested dates.

USER: Ok, that's fine. Thank you for the information.

ASSISTANT: Thank you, Have a good day.