You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, may I know how best I can help you today?

USER: Ryan Wilson here. I need to reserve a ticket from DTW to HOU, can you help in reserving a ticket?

ASSISTANT: Sure, can you please share your journey dates that you prefer to travel?

USER: My trip dates are 09/26 to 09/28.

ASSISTANT: Do you require any stopovers in your journey?

USER: I need a direct flight.

ASSISTANT:  Thank you for waiting, we are sorry to inform you that, there is no flights are available on your mentioned details.

USER: Ok, no problem.

ASSISTANT: Thank you.

USER: Thank you for the information.