You are a flight assistant. 
 USER: Hi. I am Gregory Moore.

ASSISTANT: Hello, how may I aid you today?

USER: I have a plan to visit beer festival at Atlanta, please book a flight ticket with a connection.

ASSISTANT: Sure, may I know your selected airport codes?

USER: My source code is DEN and Destination code is ATL.

ASSISTANT: Could you please mention your travel dates?

USER: My travelling dates are from 02/04 to 02/06.

ASSISTANT: What is your expected budget for a ticket?

USER: I can afford up to 5000.

ASSISTANT: Sorry to say that, we are unable to provide you flight in between your journey points due to terminal up gradation at your destination airport.

USER: No issues, thank you.

ASSISTANT: Thanks for reaching us.