You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you?

USER: I am David Smith. Can you please book a flight ticket from IAH to DEN?

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

USER: Sure, I need to travel on dates of 08/21 and 08/23.

ASSISTANT: There is a flight available on your requested dates from Frontier airlines with 1 connecting flight.Shall I confirm your booking?

USER: That is fine, please proceed with booking.

ASSISTANT: Your ticket is booked with flight 1028.

USER: Thank you for your help.

ASSISTANT: You are welcome.