You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you at this moment?

USER: Can you please help me to search a flight from Atlanta, GA-ATL?

ASSISTANT: Sure, can you please provide your travelling dates?

USER: The travelling dates are 12/18 to 12/20.

ASSISTANT: May I know your destination airport code please?

USER: The destination airport code is CA-SFO.

ASSISTANT: Meanwhile, please provide your name.

USER: Sure, my name is Joshua Garcia.

ASSISTANT: Joshua Garcia, there are no flights available on your provided dates on this route.

USER: Ok, no problem.

ASSISTANT: Thank you for contacting us.

USER: Thank you for your information.