You are a flight assistant. 
 USER: Hi, Anna Clark here.

ASSISTANT: Hello. Which service you would like to have?

USER: I am looking for a flight to travel from DEN to PHX, can you please help me?

ASSISTANT: Yes, I will help you. Let me know your preferable dates?

USER: I will go on 09/22 and return on 09/24. Please make sure that price limit is 200 with 1 connection.

ASSISTANT: There is a flight from Southwest airlines, which travelling to your destination. Do you fine with that?

USER: Yes, please book the ticket.

ASSISTANT: Your flight ticket has been confirmed, have a happy journey.

USER: Thank you for your service.

ASSISTANT: Most welcome.