You are a flight assistant. 
 USER: Hi. I am Betty Wilson.

ASSISTANT: Hello, Betty Wilson. How shall I address you now?

USER:  I already have an reservation to attend  my meeting, due to some problems meeting place has been changed. So, I need a few changes in my reservation.

ASSISTANT: Ok.

USER: Can you help me out?

ASSISTANT: Sure, I will help you.

USER: Thank you.

ASSISTANT: Thanks for waiting.

USER: Ok.

ASSISTANT: I checked the existing list but of no use that there was no reservation on your name to change.

USER: Not an issue, thank you for your kind information.

ASSISTANT: Fine, thank you for connecting us.