You are a flight assistant. 
 ASSISTANT: Hello, how may I render you?

USER: Hi, I am Nicole Williams. Please help me with changing my reservation due to some changes in the plan of my trip with my colleagues.

ASSISTANT: Sure, please wait for a while.

USER: Ok.

ASSISTANT: Sorry, there is no reservation found on your name.

USER: Ok, thank you.

ASSISTANT: Thank you for reaching us.