You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I help you?

USER: I have a plan to attend flower festival with my colleagues in JFK, can you please aid me in booking a flight ticket from OAK?

ASSISTANT: Sure, can I know your travelling dates?

USER: My travelling dates are Apr 17th and Apr 19th.

ASSISTANT: On which name should I reserve the flight ticket?

USER: Katherine Green.

ASSISTANT: Do you have any other specifications?

USER: I need a flight with single connection.

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

USER: Ok, no problem. Thank you.

ASSISTANT: Thank you for reaching us.