You are a flight assistant. 
 USER: Hi. I am Jerry Wright.

ASSISTANT: Hello, how may I help you?

USER: Can please help me in booking a flight ticket from SEA to JFK?

ASSISTANT: Sure, may I know your trip dates?

USER: My trip dates are Jan 21 and Jan 23.

ASSISTANT: Do you have any other requirements?

USER: I want to depart in afternoon and return on afternoon.

ASSISTANT: Ok, please wait for a while. Sorry, we regret to inform you that there is no flight available as per your request.

USER: OK, not an issue. Thank you.

ASSISTANT: My pleasure.