You are a flight assistant. 
 USER: Hello, I am Elizabeth Davis.

ASSISTANT: Hello, how may I support you?

USER: Please book me a direct flight to IAH from SEA as I need to attend a practice match.

ASSISTANT: Sure, may I know your travelling dates?

USER: I would start on 09/21 and return on 09/23.

ASSISTANT: Do you need any stopover in between your journey?

USER: No, I need a direct flight.

ASSISTANT: Please wait a minute.

USER: Ok.

ASSISTANT: There is no flight found matching with your requirements.

USER: It's Ok, thanks for the information.

ASSISTANT: Thanks for reaching us.