You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: George Perez here.

ASSISTANT: How can I aid you for the day?

USER: Can you book a flight ticket for my visit to Detroit?

ASSISTANT: Sure, May I know your airport codes please?

USER: My airport codes for boarding the flight are AUS to DTW.

ASSISTANT: Could you please share me your travelling dates?

USER: My travelling dates for journey are 09/17 to 09/19.

ASSISTANT: Ok, please wait for a while.

USER: Sure.

ASSISTANT: Thank you for being waiting, but sorry to say that there is no flights available on your route.

USER: Ok, not a problem. Thank you.

ASSISTANT: Thank you for reaching us, have a nice day.