You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I guide you?

USER: I want to visit Denver with my friends, please help me in booking a ticket.

ASSISTANT: Sure, may I know your airport codes please?

USER: My airport codes are from LAS to DEN.

ASSISTANT: Can you please share your planned dates to travel?

USER: My planned dates are from 04/15 to 04/17.

ASSISTANT: May I know your good name please?

USER: My name is Carol Baker.

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

USER: Ok, please book my ticket.

ASSISTANT: Your ticket is booked with flight 1003.

USER: Thank you for your help.

ASSISTANT: Most welcome.