You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello,  how can I be your helping hand today?

USER: Please help me with changing the reservation which is with name Kimberly Martin.

ASSISTANT: Sure, we are here to help you to change it.

USER: Ok.

ASSISTANT: Please wait for a moment.

USER: Sure, take your time.

ASSISTANT: We found a reservation on your name, please share your new reservation details.

USER: Ok, I need a direct flight from DFW to MSP. My travelling dates are from 12/14 to 12/16.

ASSISTANT: Ok, please wait.

USER: Ok.

ASSISTANT: Sorry to say that, there were no flights found on your requested details.

USER: Fine, thank you.

ASSISTANT: Thank you for contacting us.