You are a flight assistant. 
 USER: Hi, I am Amy Taylor.

ASSISTANT: Hello, How can I serve you?

USER: I would like to travel to Detroit to enjoy long trips with friends on 06/01. Can you make a reservation with fare 500?

ASSISTANT: Sure, May I know the journey codes?

USER: Sure, I need to depart from AUS to DTW.

ASSISTANT: Please help me with your return date.

USER: Sure, I need to return on 06/03.

ASSISTANT: Sorry, No flights found with your chosen dates. Thank you for opting us.

USER: Ok, no worries at all. Thank you for your service.