You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you today?

USER: Thomas Johnson here. Could you amend my existing reservation?

ASSISTANT: Sure, please wait a minute.

USER: Ok.

ASSISTANT: We found a reservation on your name, can you please help me with your trip dates?

USER: My itinerary dates are June 7 and June 9.

ASSISTANT: May I know your airport codes?

USER: My genesis and terminus airport codes are ATL and MSP.

ASSISTANT: Do you have any specifications?

USER: No. I need a connecting flight.

ASSISTANT: Sorry, there were no flights found on your route.

USER: No problem, thank you.

ASSISTANT: Thank you for reaching us.