You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Myself Mark Jones.

ASSISTANT: How may I assess you at this time?

USER: I would like to visit Houston, will you help me in booking the flight ticket from LAS to IAH?

ASSISTANT: Sure, may I know your preferable planned travel dates of your journey?

USER: My preferable journey dates are 08/22 and 08/24.

ASSISTANT: Please be on hold for a moment to search for the flight and I will get back to you.

USER: Ok, I will wait for your response.

ASSISTANT: Thank you for your patience, there is no flight that is moving to your region on the dates that you have mention us for booking purpose.

USER: Ok, not an issue. Thank you for your information.

ASSISTANT: Next time we can serve you better and thank you for reaching us. Have a nice day.