You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: I am Justin Robinson. Can you please book a ticket for me as I am planning to go for Center for puppetry arts at Atlanta, ATL?

ASSISTANT: Sure, can I know your preferable dates?

USER: Trip dates are 10/09 to 10/11.

ASSISTANT: Ok, let me know your source airport code?

USER: Source code is Boston, BOS.

ASSISTANT: Sorry, there are no flights found on given name.

USER: No problem. Thank you.

ASSISTANT: Thank you for reaching us.