You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello. How can I help you?

USER: I am Nicole Williams. I want to change my recent reservation, as my tour got postponed. Please help me.

ASSISTANT: Sure. Please wait for a while.

USER: Ok.

ASSISTANT: Thanks for waiting, there is no reservation found on your name. Thank you.

USER: Ok, no issues. Thank you.