You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I aid you for today?

USER: I am Matthew Moore. Can you book a ticket from PHX to IAH, to meet my brother.

ASSISTANT: Sure, I will help you with that. Can you please let me know your planned dates of your journey?

USER: Ok, my trip dates should be 12/25 and 12/27.

ASSISTANT: Please wait for sometime.

USER: Ok.

ASSISTANT: Sorry to say this Moore, there are no flights which travels to your region.

USER: It's ok, thanks for your information.

ASSISTANT: You are welcome, thank you for reaching out here.