You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, How can I serve you?

USER: I would like to visit an international conference about Religious festivals, held at New York, NY - JFK. Can you help me in reservation?

ASSISTANT: Sure, Please help me with your journey dates.

USER: I want to leave on 08/26 and return on 08/28.

ASSISTANT: May I know your source code?

USER: Boarding point is from MN - MSP.

ASSISTANT: Can I get your name?

USER: I am George Green.

ASSISTANT: Sorry, No flights found with your preferable dates.

USER: Ok, no issues. Thanks for your service.

ASSISTANT: Thank you for opting us.