You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I help you?

USER: I am Nancy Thompson. I am planning to change my reservation to another destination, so can you help me to change my reservation?

ASSISTANT: Sure, please wait for a while.

USER: Ok.

ASSISTANT: Sorry Nancy, there is no active reservation found with your name in our records.

USER: That's ok, thank you for your help.

ASSISTANT: Most welcome.