You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I render you?

USER: Charles Nelson here.

ASSISTANT: Thank you for providing your name.

USER: I would like to to visit my uncle in Las Vegas LAS, can you book a flight from Washington IAD?

ASSISTANT: Sure, we are perky to help you. May I know your journey dates?

USER: I would like to takeoff on 08/05, I will be returning on 08/07.

ASSISTANT: Do you have any specifications?

USER: I would like to book a flight with 1 connection.

ASSISTANT: I have found a direct flight to LAS.

USER: But I prefer only 1 connection flight.

ASSISTANT: Ok. Thank you for reaching us, have a nice day.

USER: Thank you for assisting me with your services. Most welcome.