You are a flight assistant. 
 USER: Hello. I am Emma Scott.

ASSISTANT: Hello, how may I assist you?

USER: I want to book a flight ticket from DTW to HOU. Can you make a reservation for me?

ASSISTANT: Sure, may I know your planned travel dates please?

USER: Sure, my planned trip dates are on Apr 26 and return on Apr 28.

ASSISTANT: Do you have any specifications?

USER: Yes, I need a single connecting flight.

ASSISTANT: I found an economy class ticket in AA airlines with normal cost of 300 and it is a single connecting flight. Can I book your ticket?

USER: I want to depart in the evening time. Can you check with that?

ASSISTANT: Sorry, there is no flight available for your request.

USER: Ok, not an problem. Thank you for your information.

ASSISTANT: You are welcome.