You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: George Young here. I need a direct flight on the route from LGA - IAH, can you help me?

ASSISTANT: Sure, may I know your trip dates?

USER: My travelling dates will be from 11/04 to 11/06.

ASSISTANT: Sorry, there is no flight on your requested dates.

USER: Oh! That's fine, thank you for checking with availability.

ASSISTANT: Thank you for reaching us.

USER: Most welcome.