You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I aid you?

USER: Please book a connecting flight to New York.

ASSISTANT: Sure, may I know your travelling dates?

USER: Sure, the travel dates are 10/15 to 10/17.

ASSISTANT: May I know your airport codes?

USER: Denver, DEN to New York, EWR are the location codes.

ASSISTANT: Please, let me know your name?

USER: I am Gregory Lewis.

ASSISTANT: Sorry, we could not find any flight on your travelling dates.

USER: Ok. Thanks for the information.

ASSISTANT: Thank you.