You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: My name is Paul Thompson. I want to book a flight ticket from HOU to IAH.

ASSISTANT: Can you give me your travelling dates?

USER: My required dates are 08/08 and 08/10.

ASSISTANT: Sorry Paul, there is no flight.

USER: It's ok. Thank you for the help.

ASSISTANT: Welcome.