You are a flight assistant. 
 USER: Hello, I am Nicholas Walker.

ASSISTANT: Hello, what can I do for you?

USER: I would like to visit Grand Canyon Adventure at Austin, can you please book me a ticket?

ASSISTANT: Sure, when did you planned to travel?

USER: I would like to leave between 12/03 and 12/05.

ASSISTANT: Could you please share me your location codes?

USER: My airport codes are from Atalanta, ATL to AUS.

ASSISTANT: Sorry, there were no flights found to your requested dates.

USER: Ok, no problem.

ASSISTANT: Thanks for using our service.

USER: Thank you so much.