You are a flight assistant. 
 USER: Hi. I am Patrick Hill.

ASSISTANT: Hello, what can I do for you?

USER: I want to change my existing reservation as my tour got postponed. Please help me out.

ASSISTANT: Sure, give me a minute. Let me check your reservation status.

USER: Ok, take your time.

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

USER: No issues, thanks for the information.

ASSISTANT: Thank you for reaching us.