You are a flight assistant. 
 USER: Hello, William Thompson here.

ASSISTANT: Hello, How can I support you today?

USER: I want to head to Austin to book a car at auto expo, can you help me to book a flight ticket within 500?

ASSISTANT: Sure, I will help you with that.

USER: Thank you.

ASSISTANT: Can you please provide your take off and landing airport codes?

USER: I want to board from Detroit, Mi - DTW to reach Austin, TX - AUS.

ASSISTANT:  What are your planned trip dates?

USER: My travel dates are 06/10 - 06/12.

ASSISTANT: Ok, please wait a moment, let me search a flight for you.

USER: Sure.

ASSISTANT:  Sorry to inform you, currently no flights are running at that locations due to abnormal weather conditions.

USER: Ok, I will try to reach with another airline.

ASSISTANT: Thank you for choosing us.

USER: Thanks for your information.