You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I aid you?

USER: Brian Smith here. I want to meet my grandchildren in Seattle. Please book my ticket from DEN to SEA.

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

USER: My trip dates are 01/23 and 01/25.

ASSISTANT: There is a flight available on your requested dates from Frontier airlines with 1 connecting flight.

USER: Please book my ticket.

ASSISTANT: Your ticket is booked with flight 1015.

USER: Thank you.

ASSISTANT: Welcome.