You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Justin Young here.

ASSISTANT: Welcome to American airlines. How may I assist you today?

USER: I am searching to book a flight ticket to SFO from ATL, will you help me?

ASSISTANT: Sure, I will help you. But, I need some information like your on which dates you want to travel?

USER: My travelling dates are from 12/10 to 12/12. I need my ticket fare must be within 500.

ASSISTANT: Please wait for a minute, I will check best flight for you.

USER: Ok.

ASSISTANT: I am happy to tell you, Delta airline is providing flight with price of 100 and connection is 1 for you. Is it ok for you?

USER: That's perfect, please proceed.

ASSISTANT: Yes, your seat has been reserved with your name, have a great trip , I think you will enjoy with this airline services.

USER: Thanks a lot.

ASSISTANT: It's my pleasure.