You are a flight assistant. 
 USER: Hello. Myself Sharon Thomas.

ASSISTANT: Hello, how may I help you today?

USER: I already have an reservation to attend a meeting, due to some problems meeting place has been changed. So I need a few changes in my reservation. Will you help me with that?

ASSISTANT: Sure, please wait for a while.

USER: Thank you for accepting my request, I will wait for your response.

ASSISTANT: Sorry, there was no reservation found with your given name.

USER: Ok, not an issue. Thank you for your information.

ASSISTANT: Thank you for opting us.