You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I oblige you today?

USER: I want to visit Austin, TX - AUS for site seeing, Can you please help me for booking?

ASSISTANT: May I know your good name?

USER: Sure, I am Susan Harris.

ASSISTANT: When do you want to start and return on?

USER: I want to start on 04/03 and return on 04/05.

ASSISTANT: Please share your destination airport?

USER: I have already provided.

ASSISTANT: Let me know your source airport code?

USER: My source is Detroit, MI - DTW.

ASSISTANT: Thank you for your details. There are no flights found with the specified dates.