You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Jeffrey Lopez.

ASSISTANT: How may I aid you?

USER: I would like to change my existing reservation due to typical climatic conditions at my visiting place, can you please help me with this?

ASSISTANT: Sure, we are here to help you.

USER: Thank you.

ASSISTANT: Please wait for a while.

USER: Sure, I will wait for your information.

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

USER: Ok, not an issue. May be my previous reservation was not done properly.

ASSISTANT: That's ok.

USER: Thank you for providing information.

ASSISTANT: Thanks for reaching us, have a nice day.