You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, which service are you looking for the day?

USER: I am William Anderson. I want to book a direct flight to attend an emergency case at GA-ATL from AZ-PHX. Can you help me?

ASSISTANT: Sure, we will help you. On which dates you want me to book your ticket?

USER: 02/12 and 02/14 are my travelling dates.

ASSISTANT: Ok, let me check the availability of flights.

USER: OK.

ASSISTANT: Sorry William Anderson, there is no direct flight on your dates.

USER: OK.

ASSISTANT: Thank you for choosing our service.

USER: tHANK YOU.