You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I guide you for today?

USER: I am Gary Thomas. I want to travel from DTW to DTW. Can you help me to book a flight ticket?

ASSISTANT: Can you please share on what dates you are willing to travel?

USER: I want to travel in the flight on 03/25 and 03/27.

ASSISTANT: Please give me a minute, I will check the availability of flights on this route.

USER: Ok, take your time.

ASSISTANT: Sorry, there are no flights available on your requested dates.

USER: That's ok. Anyways, thank you for your help.

ASSISTANT: Thank you for contacting us, have a nice day.