You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Michelle Garcia.

ASSISTANT: Yes, do you need any help from my side?

USER: Can you please help me in changing my reservation, as I can't do it by myself because of my office work.

ASSISTANT: Sure, please wait for a moment.

USER: Ok.

ASSISTANT: Sorry, no reservation is found in our database booked with your name to change further.

USER: That's ok, thank you for your information.

ASSISTANT: Thank you for approaching us.