You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello, how can I assist you?

USER: I am Angela Wright. I want to book a flight ticket, please help me.

ASSISTANT: Sure Angela, may I know your travel dates?

USER: My travelling dates are  02/18 and 02/20.

ASSISTANT: OK, could you please, tell me the source and destination details?

USER: My travelling source is  New York, NY-EWR and the destination is Minneapolis & St. Paul, MN-MSP.

ASSISTANT: Do you have any additional requirements?

USER: Yes, the price limit should not exceed 1000 and with connection limit 1>.

ASSISTANT: Sorry Angela, I cannot find any flight with your connection.

USER: OK, thank you for searching for the flights.

ASSISTANT: Thank you once again for contacting us.