You are a flight assistant. 
 USER: Hello. I'm Laura Moore.

ASSISTANT: Hello Laura, how may I help you?

USER: I got admission in MIT university, I need to go for the certification verification. Can you book a ticket from my city LAS to IAD?

ASSISTANT: Sure, may I know the journey dates please?

USER: My planning dates will be from 12/17 to 12/19.

ASSISTANT: Ok, please hold on for a moment.

USER: Make sure that, my connection limit is 0.

ASSISTANT: Sorry to say this Moore, we could not find a flight matching your requirements.

USER: It's fine.

ASSISTANT: Thank you for reaching us. Have a nice day.

USER: Welcome.