You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello. How may I assist you today?

USER: I am Catherine Mitchell. I am planning to start a new cafe at New York NY-EWR so, can you please assist me in booking a flight ticket?

ASSISTANT: Sure, help me with your planned travel dates.

USER: My planned travel dates are 01/05 and 01/07.

ASSISTANT: from where you want to start your journey?

USER: I want to start my journey from Denver, DEN.

ASSISTANT: May I know your budget?

USER: My budget is 500 for a ticket.

ASSISTANT: Sorry to say that, no flights were available on your route.

USER: Not a problem, thank you for the information.

ASSISTANT: Thank you for choosing us.