You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Gary Roberts.

ASSISTANT: How can I aid you?

USER: I am looking for a flight from New York, can you book me the flight ticket from LGA to DEN?

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

USER: My trip dates are from Feb 17th till Feb 19th.

ASSISTANT: Do you have any specifications?

USER: I need a connecting flight.

ASSISTANT: Sorry, there are no flights available for your desired dates.

USER: That's ok, not an issue. Thank you.

ASSISTANT: Thank you for reaching us.