You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Larry Adams.

ASSISTANT: How can I help you?

USER: I want to travel to Chicago to guide my students how to success in the international arts competition, could you find a flight?

ASSISTANT: Sure, please provide your airport codes.

USER: My airport codes are DTW and ORD.

ASSISTANT: Can you please provide your travelling dates?

USER: My travel dates are from 04/17 to 04/19. My price limit is 200.

ASSISTANT: Sorry, there are no flights with your price limit.

USER: It's fine. Thank you for your help.

ASSISTANT: Thank you for approaching us.