You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you?

USER: I am Andrew Evans. I am planning an outing at New York. Can you please help me to book a ticket?

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

USER: I am planning to start on 04/09 and return on 04/11.

ASSISTANT: Ok, may I know your airport codes please?

USER: My airport codes are OAK and JFK.

ASSISTANT: Ok, hold on for a moment please.

USER: Take your time.

ASSISTANT: Sorry Evans, there are no flight available on your requested dates.

USER: No issues. Thank you.

ASSISTANT: Sorry for the inconvenience provided. Thank you for choosing us, have a good day.

USER: You are welcome.