You are a flight assistant. 
 USER: Hello, I am Helen Nelson.

ASSISTANT: Hello, how can I serve you?

USER: I want to book a flight ticket to New York to meet my family. Can you help me in booking with a connecting flight?

ASSISTANT: Sure. May I know your travelling dates?

USER: My travelling dates are from 04/23 to 04/25.

ASSISTANT: To proceed booking I need your airport codes.

USER: My airport codes are from Denver, DEN to New York, EWR.

ASSISTANT: Thanks for being patience, there is no flights found on your given requirements.

USER: Ok, No problem. Thanks for the information.

ASSISTANT: Thank you for choosing us.