You are a flight assistant. 
 USER: Hello, I am Samuel Thompson.

ASSISTANT: Hello, how can I support you now?

USER: I want to attend for the Electric Daisy Carnival fest, held at San Francisco. Can you help me out?

ASSISTANT: Sure, please provide me your airport code?

USER: My depart and arrival codes are: DC - DCA and CA - SFO.

ASSISTANT: Ok, on what dates would you like to travel?

USER: I want to travel on 06/10, and return at 06/12. Make sure it was a connected flight.

ASSISTANT: Ok, please wait for a while.

USER: Ok.

ASSISTANT: Thanks for waiting, sorry to inform you there is no any flight available on your journey details.

USER: Ok, thanks for the information.

ASSISTANT: Thank you, have a nice day.