You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Kevin Williams here.

ASSISTANT: How can I help you today?

USER: I would like to visit New York to meet my best friend, please help me in booking a ticket from OAK to JFK.

ASSISTANT: Sure, I will help you in booking. Can you please share your travel dates?

USER: My planned dates are 01/29 and 01/31.

ASSISTANT: Please wait a moment.

USER: Sure, take your time.

ASSISTANT: Sorry, no flights are available on your planning dates.

USER: Ok, no issues. Thank you for your information.

ASSISTANT: Thank you for opting us.