You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you today?

USER: I would like to visit ATL from DTW  to go CNN Center, can you help me to find a flight?

ASSISTANT: May I know your dates of journey?

USER: My journey dates are 05/05 and 05/07.

ASSISTANT: Can I know your name for documentation purpose?

USER: I am David Davis.

ASSISTANT: Sorry Davis, I did not find any flight basing on your details.

USER: It's ok. Thanks for your helping.

ASSISTANT: Thank you for contacting us.