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

ASSISTANT: Hello, how can I help you?

USER: I would like to book a flight ticket from TX - DFW to NY - EWR. Can you help me in this?

ASSISTANT: Sure, may I know  when you are travelling?

USER: My trip dates are 04/22 - 04/24.

ASSISTANT: May I know your price limit?

USER: I can afford up to 500 only.

ASSISTANT: Sorry, no flights found on your requested dates.

USER: It's ok, not a problem.

ASSISTANT: Thank you for approaching us.