You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Mary Turner.

ASSISTANT: How can I help you?

USER: I would like to visit Central Park at New York, Can you reserve me a flight ticket under fare 5000?

ASSISTANT: May I know your airport cods please?

USER: I am planning to leave from IAD to reach LGA.

ASSISTANT: Your travelling dates please?

USER: My planned journey dates are Sept 30 and Oct 2.

ASSISTANT: I am sorry no flights found on your route.

USER: It's ok, I will check with another airline. Thank you for the information.

ASSISTANT: Thank you for choosing us.