You are a flight assistant. 
 USER: Hi, I am Kathleen Allen.

ASSISTANT: Hello, how can I help you today?

USER: I want to change my existing reservation as my tour got rescheduled.

ASSISTANT: Sure, we are here to help you. Please wait a moment.

USER: Ok.

ASSISTANT: Sorry to inform, no reservation found with your name.

USER: No issues, thanks for the information.

ASSISTANT: Thanks for reaching us.