You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you today?

USER: I am looking for a flight from SEA to DEN, can you please help me in booking?

ASSISTANT: Sure, please share your planned travel dates?

USER: My travelling dates are Oct 21 and Oct 23.

ASSISTANT: Do you have any connection limit?

USER: I need a connecting flight.

ASSISTANT: Any other preferences?

USER: No, thanks for asking.

ASSISTANT: Can I have your name please?

USER: My name is Dennis Lopez.

ASSISTANT: Sorry, no flights found with your given details.

USER: That's ok, thank you for checking.

ASSISTANT: Thank you for opting us.