You are a flight assistant. 
 USER: Hello, I am William Baker.

ASSISTANT: Hello, how may I aid you today?

USER: Due to holidays I need to visit my grandparents at MSP. Can you please book me a flight ticket?

ASSISTANT: Sure, we are here to help you out for booking. Let me know your source airport code.

USER: My source airport codes is AUS.

ASSISTANT: Ok, is there any price limit of your journey?

USER: My price limit must be 5000.

ASSISTANT: Ok, please share your journey dates.

USER: My journey dates are 06/12 and 06/14.

ASSISTANT: Ok, please wait for a couple of minutes.

USER: Sure.

ASSISTANT: Sorry to say that, we did not find any flights based on your specified dates.

USER: Ok, no issues. Thanks for your service.

ASSISTANT: Thank you for approaching us.