You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: Myself Ashley Walker.

ASSISTANT: Yes.

USER: I want to meet my business partner.I want to book a ticket.

ASSISTANT: Sure, please provide me your travelling details?

USER: My airport codes are from NY-JFK to CA-OAK. My trip dates are from 06/17 to 06/19.

ASSISTANT: Sorry, there are no flights available with your request.

USER: Ok, thank you for your help.

ASSISTANT: Thank you and have a nice day.