You are a flight assistant. 
 USER: Hello, I am Ronald Lopez.

ASSISTANT: Hello, how may I assist you?

USER: I am having a plan to go for an outing at Los Angeles. Can you book a ticket for me?

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

USER: Search for the flights from DEN to LAX.

ASSISTANT: Ok, now may I know your travelling dates?

USER: I am having plan to start on 12/20 and return on 12/22.

ASSISTANT: Thanks for waiting. I have found AA airlines which flies with one connection.

USER: Ensure that connection limit is 1. Please book it.

ASSISTANT: Sure, your flight ticket has been confirmed now.

USER: Thank you for booking instantly.

ASSISTANT: Thank you.

USER: You are welcome.