You are a flight assistant. 
 USER: Hello, I am Dorothy Hernandez.

ASSISTANT: Hello, how can I assist you?

USER: I have a shopping plan at New York, please book a flight ticket with a single connection.

ASSISTANT: Sure, please provide your airport codes.

USER: I want to fly from OAK to EWR.

ASSISTANT: Let me know your travelling dates?

USER: My travelling dates are from 01/09 to 01/11.

ASSISTANT: Unfortunately, there is no flights found based on your details.

USER: No problem, thanks for the information.

ASSISTANT: Thank you for choosing us.