You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Jessica Lopez.

ASSISTANT: What can I do to make your experience better with us?

USER: I have to attend a Music Concert at Las Vegas, could you please help me with booking a flight ticket from IAD to LAS?

ASSISTANT: Sure, we are here to make your journey comfort. How much fare you are expecting for the flight ticket?

USER: Make sure that the ticket fare is 500 or less.

ASSISTANT: Could you please let me know if you need a connecting flight?

USER: Yes, I need a connecting flight.

ASSISTANT: On what dates would you like to book a flight ticket for you?

USER: I would like to take off on 10/23 and return on 10/25.

ASSISTANT: Ok, please wait a moment I will search best flight for you.

USER: Sure, take your time.

ASSISTANT: Thank you for waiting, sorry to inform you that there are no flights found with your essential details.

USER: That's ok, I will find an another alternate way to complete my trip. Anyways, thank you for the information.

ASSISTANT: Thank you for availing us.