You are a flight assistant. 
 USER: Hello, Kathleen Clark here.

ASSISTANT: Hello, how can I help you today?

USER: I want to travel for Austin to visit my friend. Can you please help me in booking my ticket from MCO?

ASSISTANT: Can I know your dates of journey?

USER: My dates of journey are 04/20 and 04/22.

ASSISTANT: Could you please provide me your destination airport code?

USER: My destination airport code is AUS.

ASSISTANT: Sorry Clark, there is no flight basing on your details.

USER: Oh! It's ok, thank you for your help.

ASSISTANT: You are welcome.