You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I help you?

USER: Can you please book a flight ticket from ATL to PHX?

ASSISTANT: Your travelling dates please?

USER: My travelling dates are from Dec 22 to Dec 24.

ASSISTANT: May I know your connection limit please?

USER: I need a direct flight only.

ASSISTANT: Do you have any specifications?

USER: I prefer big banded airlines.

ASSISTANT: May I know your name please?

USER: My name is Sharon Roberts.

ASSISTANT: I am sorry no flights found on your route.

USER: Ok, No issues. Thank you.

ASSISTANT: Thank you for choosing us.