You are a flight assistant. 
 USER: Hello. I am Mark Baker.

ASSISTANT: Hello. How can I aid you?

USER: I want to visit Billy Graham Library at Charlotte to know more about history, can you please help me in reserving a ticket?

ASSISTANT: Sure, may I know your travelling dates?

USER: My travel dates are from 02/27 to 02/29.

ASSISTANT: Help me with your travelling points?

USER: DTW to CLT are my travelling points.

ASSISTANT: Do you have any connection limit?

USER: I need a direct flight.

ASSISTANT: Sorry to inform you that no direct flights are available on your travel dates.

USER: Ok, no issues. Thank you.

ASSISTANT:  Thank you for availing us.