You are a flight assistant. 
 USER: Hi, my name is Samuel Nelson.

ASSISTANT: Hello, how may I assist you for today?

USER: I want to attend a concert in New York, can you please book the ticket from OAK to JFK?

ASSISTANT: Can you please share your travelling dates for this journey?

USER: I want to depart on 03/27 and return on 03/29.

ASSISTANT: Please hold on for a moment Samuel Nelson.

USER: Sure.

ASSISTANT: Sorry to inform you but there are no flights available as per your request.

USER: No problem, I will find some other way to travel. Anyway thank you for checking.

ASSISTANT: Thank you for reaching us.