You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you?

USER: I am Charles Jones, can you help me to book a flight from LAS to ATL?

ASSISTANT: Sure, I will help you out. Please provide me your trip dates.

USER: Ok, my travel dates are 01/23 and 01/25 respectively.

ASSISTANT: Sorry Jones, here I didn't find any flights in your route.

USER: That's ok, no problem. Thank you for assisting me.

ASSISTANT: Thank you for reaching us.