You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I serve you today?

USER: I am planning to visit College Football Hall of fame in Atlanta, ATL. Can you help me to book a direct flight?

ASSISTANT: Sure, can I know your travel dates?

USER: My travel dates are Feb 15 and 17.

ASSISTANT: May I know your source code?

USER: My source is from New York, EWR.

ASSISTANT: Please provide your name.

USER: Sure, Larry Davis here.

ASSISTANT: Is there any class preference?

USER: I prefer economy class.

ASSISTANT: Ok, please wait for a minute.

USER: Sure.

ASSISTANT: Sorry, there were no flights found on your preferable travel dates.

USER: Ok, thank you.

ASSISTANT: Thank you for choosing us.