You are a flight assistant. 
 USER: Hello, I am Lisa Carter from Chicago.

ASSISTANT: Hello, how may I render you today?

USER: I have planned to go for Film festival which is going to be held at New York, NY - EWR. Can you please book a ticket under price 200?

ASSISTANT: Sure, Can you please help me with your source airport code?

USER: I want to fly from Chicago, IL - ORD.

ASSISTANT: May I know when you have planned to travel?

USER: My travelling dates are 06/25 and 06/27.

ASSISTANT: Do you have any specifications?

USER: Yes, I need a halt.

ASSISTANT: OK, please hold on.

USER: Sure.

ASSISTANT: Thanks for waiting. Sorry to say that, there is no flights found with your given details.

USER: Ok, no issues. Thank you.

ASSISTANT: Thank you for reaching us, have a great day.