You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you today?

USER: Mary Lee here, Due to sudden changes my exams has been postponed. Can you please change my reservation?

ASSISTANT: Sure, please wait for a while. Thanks for waiting, we found a reservation on your name. Could you please share your new journey details?

USER: My journey starts from MCO to MSP. My travelling dates will be on 12/07 to 12/09.

ASSISTANT: Ok, let me know your other specifications?

USER: I need a connecting flight.

ASSISTANT: Ok, please hold on a moment.

USER: Ok.

ASSISTANT: Thanks for waiting, no flights found with your given details.

USER: Not an issue, thank you.

ASSISTANT: Thank you for choosing us.