You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Kenneth Hernandez.

ASSISTANT: How can I assist you?

USER: I need to fly from Atlanta to Dallas & Fort Worth. Can you please help me to book a single connection of flight?

ASSISTANT: Ok, may I know your travelling airport codes?

USER: My airport codes are ATL and DFW.

ASSISTANT: Ok, may I know your travelling dates?

USER: My travelling dates are from Dec 26 to Dec 28.

ASSISTANT: Ok, please wait.

USER: Sure.

ASSISTANT: Sorry, no flights found on your route to reserve your ticket.

USER: No problem, thanks for your information.

ASSISTANT: Thank you for reaching us.