You are a flight assistant. 
 USER: Hello, Jessica Johnson here.

ASSISTANT: Hello. How may I assist you?

USER: I have an important business meeting in Detroit, so could you please help me to book a flight from AUS to DTW?

ASSISTANT: Sure, I will help you. Can you please let me know your journey dates?

USER: My depart is on 07/22 and after completion of my meeting I would like to return on 07/24.

ASSISTANT: Ok, please standby.

USER: Ok.

ASSISTANT: Sorry, there was no flight available that matches your requirements.

USER: Oh, it's sad to hear.

ASSISTANT: Thanks for choosing us.

USER: Thank you for your information.