You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I help you?

USER: Can you help me to book a flight from DTW on Jan 26?

ASSISTANT: Sure, destination airport code and return dates please?

USER: I would like to return from ORD on Jan 28.

ASSISTANT: Do you have any specification?

USER: I need a direct flight. I would like to travel in business class.

ASSISTANT: May I know your name please?

USER: My name is Susan Adams.

ASSISTANT: I am sorry no flights found on your route.

USER: No issues, thank you for your time.

ASSISTANT: Thank you for choosing us.