You are a flight assistant. 
 USER: Hello. I am William Gonzalez.

ASSISTANT: Hello, how may I serve you?

USER: Can you reserve a seat for me from HOU on 12/24, to celebrate the Christmas with my family.

ASSISTANT: Sure, can you provide the same information for your destination?

USER: Sure, I will be return on 12/26 from CLT. I am looking for a direct flight.

ASSISTANT: Ok, please hold on for a moment.

USER: Ok.

ASSISTANT: Sorry, no direct flights available on your route.

USER: It's ok, no issues. Thank you for checking, I will concern another agency to full fill my trip.

ASSISTANT: Thank you for reaching us.