You are a flight assistant. 
 USER: Hello. I am Jonathan Hill.

ASSISTANT: Hello, how can I give assistance to you?

USER: I need to book a ticket with fare of 500 from ORD to EWR. Could you please help me in doing that?

ASSISTANT: Sure, aid me with your journey dates.

USER: My travelling dates are 06/02 and return on 06/04.

ASSISTANT: Ok, Is there any price limit?

USER: I already mentioned above.

ASSISTANT: Ok, hold on a moment.

USER: Sure.

ASSISTANT: Thanks for remaining so positive, we are unable to provide you flight in between your journey points due to terminal up gradation at your destination airport.

USER: No problem, thank you for your information.

ASSISTANT: Thank you for contacting us.