You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

USER: Deborah King here. I want to book a direct flight on the route from IAH - HOU, can you help me?

ASSISTANT: May I know your travel dates?

USER: My travelling dates will be from 07/17 to 07/19.

ASSISTANT: Sorry, there is no flight found basis on your details.

USER: Oh! That's sad to know, thank you for checking anyways.

ASSISTANT: Thank you for reaching us.

USER: Most welcome.