You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: I have an meeting at Detroit, with my company CEO. As per my company rules I need to travel only in a direct flight. So, can you provide me a ticket in that?

ASSISTANT: Sure, please share me your travelling dates?

USER: Ok, I want to travel to Detroit on 08/11, and my return will be on 08/13.

ASSISTANT: Kindly assign me your airport codes?

USER: Boarding point is Chicago International airport, ORD and landing on Detroit, DTW.

ASSISTANT: May I know your name?

USER: Sure, Joshua Collins is my name.

ASSISTANT: Sorry, there are no flights with your specifications.

USER: That's ok, I will choose my own transportation for my journey. Thanks for your information.

ASSISTANT: Thank you for reaching us.