You are a flight assistant. 
 USER: Hi. Thomas Anderson here.

ASSISTANT: Hello, how may I guide you?

USER: Can you book a ticket from DTW to AUS?

ASSISTANT: Sure, can I know your preferable dates?

USER: I would like to travel on 06/05 and 06/07.

ASSISTANT: I am sorry, there are no flights available.

USER: .

ASSISTANT: Thank you.

USER: Thank you.