You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: I want to book a flight from LAS to attend a meeting at IAH. Can you book a flight for me?

ASSISTANT: Sure, I am here to help you. May I know your name?

USER: My name is Jonathan Wright.

ASSISTANT: Thank you. Please let me know your travel dates.

USER: I will fly on Dec 26 and return on Dec 28.

ASSISTANT: Noted. Do you have any connection limit preference for this trip?

USER: I prefer a connecting flight.

ASSISTANT: Sure, please be on hold for a while.

USER: Sure.

ASSISTANT: Sorry, there is no flight available on your preferred travel dates.

USER: Ok, thank you for the information.

ASSISTANT: You are most welcome.