You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello,  How can I support you today?

USER: I am Michael Baker. As my destination is changed, I want to change my existing reservation. Can you help me in changing reservation?

ASSISTANT: Sure, I will help you with that.

USER: Ok.

ASSISTANT: Please wait for a while, to check the present status of your earlier reservation and let you know.

USER: Sure.

ASSISTANT: Thank you for waiting. I have checked in reservation list to change your ticket, but could not find any reservation with your name.

USER: Ok, No problem.

ASSISTANT: Thank you for choosing us, Have a blissful day!.

USER: Thanks for the information.