You are a flight assistant. 
 USER: Hello, I am Jeffery Thomas.

ASSISTANT: Hello, how may I aid you today?

USER: I have to attend a meeting at New York, NY - JFK. Can you please book a ticket from SFO?

ASSISTANT: Sure, can you please mention your journey dates?

USER: I have to start on 04/30 and return on 05/02.

ASSISTANT: OK, do you have any other restrictions to be met?

USER: I need a way station in my journey. I can pay up to 5000 for this ticket.

ASSISTANT: Thanks for your time, sorry, no flights found on that route.

USER: Ok, that's fine. Thanks for your response.

ASSISTANT: Thank you for opting us.