You are a flight assistant. 
 USER: Hello, I am Sarah Adams.

ASSISTANT: Hello,. How may I help you?

USER: I want to book a flight ticket to Atlanta with price under 500, can you help me with it?

ASSISTANT: Definitely. Please provide your journey dates?

USER: My journey dates are 07/26 to 07/28.

ASSISTANT: May I know your journey location codes?

USER: Journey codes are BOS-ATL.

ASSISTANT: I'm sorry, there are no flights available.

USER: OK, no issues.

ASSISTANT: Thanks.

USER: Thanks for the help.