You are a flight assistant. 
 USER: Hello, Joseph Scott here.

ASSISTANT: Hello Scott, how may I help you?

USER: On a sudden business meet I need to travel to another city, so, I want to change my trip what recently I had booked a ticket, could you help in that?

ASSISTANT: Sure, I can help out in changing. Please wait a moment.

USER: Ok.

ASSISTANT: I found a reservation could you provide your details?

USER: My preferable dates are from 06/10 to 06/12 and I want to travel from ATL to MSP.

ASSISTANT: Wait a moment.

USER: Ok.

ASSISTANT: Sorry, there is no flight found on your request.

USER: Ok, thank you for the information.

ASSISTANT: Thank you reaching us.