You are a flight assistant. 
 USER: Hello, would you like to make a flight reservation for me?

ASSISTANT: Hello, we are here to serve you. To proceed we need your journey details.

USER: Yes, I will fly on Aug 9 from CA - SFO and fly out on Aug 11 to NV - LAS.

ASSISTANT: OK, are there any other requirements?

USER: Please keep in mind price limit should be 1000 with only one connection.

ASSISTANT: OK, please give me a moment I will check the availability and let you know.

USER: Sure.

ASSISTANT: Thanks for being patient, Unfortunately we did not find any flights available with your criteria. May I know your name?

USER: Yes, my name is Ronald Moore. Thanks for your service.

ASSISTANT: Thanks for reaching us.