You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I help you?

USER: Can you please help me in reserving a flight ticket to ATL from LAS?

ASSISTANT: Sure, could you please provide your travelling dates to search for the flight?

USER: My preferred travel dates are from Oct 19 to Oct 21.

ASSISTANT: Do you have any connection preferences?

USER: I need a connecting flight.

ASSISTANT: Can I know your name?

USER: I am Debra Green.

ASSISTANT: Do you have any requirements?

USER: Yes, I would like to travel in economy class which departs in the morning.

ASSISTANT: Sorry to say, there is no flight available for you as per your requests.

USER: Ok, no problem. Thank you.

ASSISTANT: Thank you for reaching us.