You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am George Scott.

ASSISTANT: How may I help you out?

USER: I am planning to visit Museum of Nature and Science at Denver, could you please help me with booking a flight ticket from SEA to DEN?

ASSISTANT: Sure, I will help you in booking the ticket. May I know your travelling dates please?

USER: I would like to take off on 12/16 and return on 12/18.

ASSISTANT: Sorry, there are no flights found.

USER: That's ok, I will find an another alternate way to complete my trip.

ASSISTANT: Thank you for reaching us.

USER: Anyways, thank you for the information.