You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you?

USER: I am Amy Mitchell. I am planning to visit Lady Bird Lake at Austin, could you please help me with booking a flight ticket?

ASSISTANT: Sure, I will help you with that. Can you please help me with your planned dates of journey?

USER: I would like to take off on 01/24 and return on 01/26.

ASSISTANT: What are your boarding and takeoff airport codes?

USER: My source airport code is DTW and destination airport code is AUS.

ASSISTANT: Sorry Amy, there is no flight route on your specified dates.

USER: That's ok, I will find an another alternate way to complete my trip. Anyways, thank you for the information.

ASSISTANT: Most welcome.