You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hi. How can I assist you?

USER: I am William Hill here, I would like to travel for a Atlanta, can you please reserve my ticket?

ASSISTANT: Sure, I will help you.

USER: Thank you.

ASSISTANT: Can I know your travel dates?

USER: Sure, my respective dates of journey is from 10/01 to 10/03.

ASSISTANT: Please share your airport codes.

USER: Ok, my respective airports codes are from DTW to ATL. I want a direct flight.

ASSISTANT: Please give me a minute.

USER: Sure, take your time.

ASSISTANT: Sorry, there is no flight available on your requested dates.

USER: Ok, no problem. Thank you for your service.

ASSISTANT: You are welcome.