You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I help you?

USER: I want to book a flight ticket to take a part in an cultural event which is going to held at NY. Can you help me with this?

ASSISTANT: Sure, tell me your travel dates please?

USER: Thank you. Dec 11th and 13th are my trip dates.

ASSISTANT: May I know your name please?

USER: Christopher King here.

ASSISTANT: Are you looking for a stopover in your journey?

USER:  Yes, I need a break in between my journey.

ASSISTANT: Please help me with your airport codes?

USER: SEA and EWR are my airport codes.

ASSISTANT: Any other preferences?

USER: No.

ASSISTANT: Please wait.

USER: Ok.

ASSISTANT: Thanks for waiting. Sorry to inform you that presently stopover flights are not available.

USER: No issue.

ASSISTANT: Thank you.

USER: Thank you.