You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello.

USER: I am Barbara Lewis.

ASSISTANT: How can I help you today?

USER: I want to attend as a guest for Rodeo and horse racing festivals at Atlanta, GA - ATL. Can you book me a ticket within the range 1000?

ASSISTANT: Sure, I will help you, may I know your travelling dates?

USER: I want to travel on 12/30, and need to catch return flight on 01/01.

ASSISTANT: Could you please state your source code?

USER: Source is from MI - DTW.

ASSISTANT: Sorry, no flights found on your requested dates.

USER: Ok, no issues.

ASSISTANT: Thank you for approaching us.

USER: Thanks for the information.