You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: My name is Helen Hernandez, I want to book a flight to New York, NY-JFK to meet my friend. Can you book a connecting flight for me?

ASSISTANT: Sure, may I know your source airport code?

USER: My source airport code is Oakland, CO-OAK.

ASSISTANT: Can I know your travelling dates?

USER: I will fly on 10/27 and return on 10/29.

ASSISTANT: Please wait for a moment.

USER: Sure.

ASSISTANT: Sorry to say, no flight is available for you on your requested dates.

USER: Ok, thank you for the information.

ASSISTANT: Thank you for reaching us, have a nice day.