You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you today?

USER: My name is Nicholas Scott. I just need your help in booking a plane ticket from IAH to SEA.

ASSISTANT: Sure, I will help you with that. Can you please mention your travel dates for booking flight ticket?

USER: Sure, my trip dates are from 06/10 to 06/12.

ASSISTANT: Please hold on a moment, I will check flight availability.

USER: Ok.

ASSISTANT: Sorry no flights available in this route as per your requested dates.

USER: That's ok, thank you.

ASSISTANT: You are welcome.