You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: Christopher Hall here.

ASSISTANT: How can I assist you today?

USER: I would like to book a ticket from ATL to HOU, can you please help me with that?

ASSISTANT: Sure, please share your travel dates too.

USER: The travel dates are from 02/28 to 03/01.

ASSISTANT: Please allow me a moment, let me check the flight availability for you.

USER: Ok.

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

USER: That's ok, thank you for your help.

ASSISTANT: Welcome, have a nice day.