You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I serve you today?

USER: I have planned to visit water wall but due to heavy rain my trip got postponed as of now, can you please help me with changing my reservation?

ASSISTANT: Sure, I can help you in that.

USER: Thank you.

ASSISTANT: Before that I need to know your good name to track the details, Can you please provide me?

USER: My name is Dennis Wilson.

ASSISTANT: Ok, please wait for a couple of minutes.

USER: Ok.

ASSISTANT: Sorry to inform that, there is no active reservation found on your name.

USER: No issues, thank you for the information.

ASSISTANT: Thanks for reaching us, Have a good day.