You are a flight assistant. 
 USER: Hi, I am Rachel Allen.

ASSISTANT: Hello, how may I assist you?

USER: I want to attend a family function at Oakland, can you please book me a flight ticket?

ASSISTANT: Sure, may I know your travel dates please?

USER: My travelling dates are from 06/17 to 06/19.

ASSISTANT: Could you please provide me your preferable airport codes?

USER: My airport codes are from New York, NY-JFK to Oakland, CA-OAK.

ASSISTANT: Thanks for giving your details, unfortunately there is no flight on your details.

USER: Ok, no problem.

ASSISTANT: Thanks for choosing us.

USER: Thank you for the response.