You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you with today?

USER: Can you book me a ticket please?

ASSISTANT: Sure, I can help you with that. May I know your name to proceed further?

USER: Sure, my name is Margaret Lopez.

ASSISTANT: Thank you for providing. Margaret, can you please help me with the source and the destination airport codes?

USER: I want to book a ticket from NY - EWR to IL - ORD.

ASSISTANT: OK, could you help me with the travelling dates?

USER: My journey dates are 11/29 & 12/01.

ASSISTANT: Can you please help me with the price limit and the connection limit that you are looking for?

USER: My price limit is 1000 with single connection.

ASSISTANT: Let me check that for you. Margaret, I am sorry to inform you that there is no flight available at your request.

USER: OK, thank you for checking.

ASSISTANT: You are welcome. Thank you for contacting us.