You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: Can you please assist me to book a flight ticket from Houston to reach Detroit?

ASSISTANT: May I know your desired travel dates please?

USER: I am happy for your quick response. My desired travel dates are Feb-17 and Feb-19.

ASSISTANT: Can I know your preferred airport codes please?

USER: My preferred boarding and landing airport codes are HOU and DTW.

ASSISTANT: May I know your name please?

USER: My name is Jonathan Scott.

ASSISTANT: Do you have any other specifications?

USER: I want a flight which is returning in the afternoon time.

ASSISTANT: Sorry to say, there is no flight on your desired travel dates.

USER: It's ok, I will choose some other source to reach my destination location. Anyways thank you for checking the flight availability.

ASSISTANT: Thank you for opting us.

USER: You are welcome.