You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you?

USER: Can you please help me with finding a flight from DFW to DTW for my business trip?

ASSISTANT: Sure, I am here to help you. Can you please share your travel dates?

USER: My journey dates are from Apr 17th to Apr 19th.

ASSISTANT: Do you have any connection limit?

USER: I need a direct flight.

ASSISTANT: May I know your class preference?

USER: I was looking for an economy class flight.

ASSISTANT: Do you have any other requirements?

USER: No, thanks for asking.

ASSISTANT: Let me know your name to proceed further.

USER: My name is Angela Green.

ASSISTANT: Sorry, there are no flights in this route as per your travelling details.

USER: Ok, no problem. Thank you for checking.

ASSISTANT: Thank you for choosing us.

USER: You are most welcome.