You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, What kind of help are you expecting from our side?

USER: I am planning to attend music concert at DCA, can you please help me with booking a flight ticket from DEN?

ASSISTANT: Sure, I am euphoric to help you with booking. May I know on which dates you are planning to start and return?

USER: I would like to take off on Dec 24 and return on Dec 26.

ASSISTANT: Do you prefer any lay by in between journey?

USER: I am looking for a connecting flight.

ASSISTANT: Is there any other specifications regarding your journey?

USER: I don't have any other specification.

ASSISTANT: May I know your good name please?

USER: My name is William Gonzalez.

ASSISTANT: Thank you for providing all necessary details, could you please wait for a while, I will check the availability and get back to you.

USER: Sure, take your time.

ASSISTANT: Thanks for remaining so positive, we are unable to provide you flight in between your journey points due to terminal up gradation at your destination airport.

USER: Ok, no issues. Thank you for the information.

ASSISTANT: Thanks for approaching us, wish you a great day.

USER: You are welcome.