You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

USER: Kathleen Lewis here. I want to book a ticket from MSP to IAH, hoping that it is not an issue for you.

ASSISTANT: Sure, please provide me your travelling dates.

USER: I would like to travel on 05/24 and 05/26.

ASSISTANT: Ok, wait a moment. Sorry Lewis, there is no flight available for you.

USER: It's ok, no issues. Thank you for your help.

ASSISTANT: Welcome. Thank you for choosing us. Have a nice day.