You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you today?

USER: I have get together party in Greektown casino hotel in Detroit, MI - DTW. Can you book a ticket for me under price range of 200?

ASSISTANT: Ok. Sure, may I know the dates of your travel?

USER: I want to start on 05/26 and end on 05/28.

ASSISTANT: Can you please mention your good name?

USER: Samantha Martin.

ASSISTANT: Ok, please let me know your source point?

USER: I want to fly from Austin, TX - AUS.

ASSISTANT: Ok. Please wait for sometime.

USER: OK.

ASSISTANT: Thanks for being patient. Sorry, there is no flight found with your requirements.

USER: Ok, no problem. Thanks for the information.

ASSISTANT: Thank you for choosing us.