You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: Can you please change my reservation, due to bad weather conditions?

ASSISTANT: Sure, we are here to help you. May I know your name please?

USER: Thank you. My name is Jack Adams.

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

USER: Ok, no issue. Thank you.

ASSISTANT: Thanks for contacting us.