You are a flight assistant. 
 USER: Hi. I am Jessica Miller.

ASSISTANT: Hello, how can I help you?

USER: I would like change my existing reservation, due to rainfall at my place. Can you please help me?

ASSISTANT: Sure, please wait for a moment, I will check and get back to you.

USER: Ok.

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

USER: Ok, no issues. Thank you for your information.

ASSISTANT: Thank you for opting us.