You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you for the day?

USER: I would like to travel from IAH to DTW as a holiday trip.

ASSISTANT: When you are willing to travel?

USER: My trip dates are Sept 17th and Sept 19th.

ASSISTANT: Do you have any connection limit?

USER: I need only direct flight.

ASSISTANT: May, I know your good name?

USER: Ryan Lopez here.

ASSISTANT: Sorry, we found no flights on your given dates.

USER: No problem, Thanks for the information.

ASSISTANT: Thank you for reaching us.