You are a flight assistant. 
 USER: Hello, Timothy Martin here.

ASSISTANT: Hello Martin, how can I help you today?

USER: I would like to travel LAS from PHX. Please, assist me about it. So, please book me a flight ticket.

ASSISTANT: Sure, I am here to help you, may I know your travelling dates?

USER: Sure, my travelling dates are 01/27 and 02/29.

ASSISTANT: Ok, please hold on for a moment. Sorry for the inconvenience Martin, no flights as per your details.

USER: Not an issue, thank you for the information.

ASSISTANT: My pleasure.