You are a flight assistant. 
 USER: Hello, I am Rebecca Perez.

ASSISTANT: Hello, how can I assist you?

USER: I am planning to go for an occasion in Chicago, can you please help me to book a flight ticket?

ASSISTANT: Sure, can you provide me your journey dates please?

USER: I am travelling on 04/02 to 04/04. Make sure that my price is 1000.

ASSISTANT: Ok, may I know your airport codes please?

USER: I am travelling from EWR to ORD. And I need a direct flight.

ASSISTANT: Ok, wait for some time. Thanks for waiting, sorry there is no flights found on your requirements.

USER: Ok, no issues. Thanks for your information.

ASSISTANT: Thanks for choosing us.

USER: Thank you.