You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Timothy Johnson.

ASSISTANT: How can I help you Timothy?

USER: Can you please book a ticket from LAS to MSP?

ASSISTANT: Sure, I will help you. Please mention your planned journey dates.

USER: Sure, my travelling dates are from 04/16 to 04/18.

ASSISTANT: Ok, please hold on for a moment.

USER: Ok. take your own time.

ASSISTANT: Sorry Timothy, no flight is available for you as per your requirements.

USER: OK, no issues.

ASSISTANT: Thank you for contacting us.

USER: Thank you for your information.