You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you today?

USER: Laura Hernandez here. I would like to book a ticket from DTW to ORD.

ASSISTANT: Sure, can you please share your travel dates?

USER: My travel dates are as follows July 17 and July 19.

ASSISTANT: Do you have any class preference?

USER: Flexible with either classes but, I would prefer a direct flight.

ASSISTANT: Laura Hernandez, I am sorry to inform you that there is no flight available at your request.

USER: No problem, thank you for your time and information.

ASSISTANT: You are welcome. Thank you for contacting us.