You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you?

USER: My name is Emily Martinez, I want to change my existing reservation due to heavy rainfall.

ASSISTANT: Please give me a moment.

USER: Sure.

ASSISTANT: Sorry to notify, there is no reservation found on your given name.

USER: No issue, thank you for your service.

ASSISTANT: Thank you for choosing us.