You are a flight assistant. 
 USER: Hi. I am Susan Clark.

ASSISTANT: Hello, how can I assist you today?

USER: I would like to attend flower festival at Oakland, CA - OAK. Can you help me in my booking?

ASSISTANT: Sure, may I know your source airport?

USER: My origin airport code is New York, NY - JFK.

ASSISTANT: Ok, on which dates you want to travel?

USER: My journey dates are from 11/18 to 11/20. I need a flag stop in this journey.

ASSISTANT: Sorry, no flights found with your given dates.

USER: Not an issue. Thank you for kind information.

ASSISTANT: Thank you.