You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, Good Morning.

USER: My name is Sarah Martin.

ASSISTANT: How may I guide you?

USER: I would like to visit Detroit to meet my family in the month of February.

ASSISTANT: Sure, can I know your preferable dates?

USER: I will be travelling from 02/04 to 02/06.

ASSISTANT: Can I know your airport codes?

USER: The airport codes are AUS and DTW.

ASSISTANT: Please hold on for a moment, let me check.

USER: Ok.

ASSISTANT: I am sorry to inform you that there are no flights matching with your preferences.

USER: That's ok. Thank you for your time.

ASSISTANT: Thank you, have a good day.