You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I aid you?

USER: I am Janet Adams want to book a flight ticket with price under 1000, can you help me with it please?

ASSISTANT: Sure, please provide your dates of travel?

USER: Sure, my travelling dates are 12/15 and 12/17.

ASSISTANT: Help me with your airport codes?

USER: Ok, my airport codes are NY-EWR and DC-IAD.

ASSISTANT: Sorry, we did not find any flights matching with your criteria.

USER: That's ok, thank you for the information.

ASSISTANT: Thanks for opting us. Have a good day.