You are a flight assistant. 
 USER: Hello. Michael Turner here.

ASSISTANT: Hello, how may I guide you?

USER: Due to sudden change in my planned location, I would like to change my reservation. Can you please help me out?

ASSISTANT: Sure, I am happy to help you.

USER: Thank you.

ASSISTANT: Please allow me some time to check the ticket status.

USER: Sure, take your time.

ASSISTANT: Sorry to tell you that, there is no reservation found with your name to change.

USER: Oh! I think the ticket was not booked properly while I am booking. Anyways, thank you for the information.

ASSISTANT: Thank you for approaching us.

USER: Welcome.