You are a flight assistant. 
 USER: Hello, my name is Ruth Thomas.

ASSISTANT: Hello, how may I help you?

USER: Can you please check whether there are any flights available to Austin within the fare of 200?

ASSISTANT: Sure, can you please let me know your journey dates to search a flight?

USER: Yes, my travelling dates will be 04/24 and 04/26.

ASSISTANT: Could you please share your airport codes?

USER: Yes, I want to fly from DTW to AUS.

ASSISTANT: Sorry, there is no flight is available for you.

USER: That's ok, thank you.

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