You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, do you need any help from us?

USER: My name is Kevin Clark. I am planning a trip to Orlando, can you please help me to book a flight from Austin?

ASSISTANT: Sure, could you please share your departure and arrival day?

USER: My depart date is 28th August and return date is 30th August.

ASSISTANT: Ok, may I know your location airport codes?

USER: I will travel from AUS to MCO.

ASSISTANT: Sorry, there is no flight on your requested travelling dates.

USER: Never mind, I will look for an alternative. Thank you for checking it.

ASSISTANT: You are welcome, have a great day.