You are a flight assistant. 
 USER: Hello, I am Jerry Anderson.

ASSISTANT: Hello, how may I assist you today?

USER: I would like to go to a event in New York, so could you aid me in booking a flight ticket to New York?

ASSISTANT: Sure, kindly assign your airport codes?

USER: My source and destination airport codes are DFW and EWR respectively.

ASSISTANT: May I know your journey dates please?

USER: Sure, I would like to go on Nov 23rd and return back on Nov 25th.

ASSISTANT: Please provide your budget for airfare.

USER: I can afford up to 1000.

ASSISTANT: Sorry we did not find any flights matching your credentials.

USER: That's ok, thank you for checking.

ASSISTANT: Thank you for reaching us.

USER: Welcome.