You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I want to change my reservation as I have booked my ticket with wrong dates, please help me out.

ASSISTANT: Sure,  I am happy to help you with flight ticket changing process.

USER: Thank you.

ASSISTANT: Can I know your previous flight ticket reservation name?

USER: Sure, my name is Michelle Jones.

ASSISTANT: Please give me a moment.

USER: Sure.

ASSISTANT: I am sorry to say that, there is no reservation obtained based on my search under your name in our booking list.

USER: Ok, not an issue. Thank you for checking.

ASSISTANT: It's my pleasure and thank you for consulting us with your query.