You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you?

USER: I am Elizabeth Hernandez.

ASSISTANT: Ok.

USER: I need to change my recent existing reservation due to heavy rain fall in our city. Could you please help me in doing that?

ASSISTANT: Sure, please wait for a moment.

USER: Ok.

ASSISTANT: Sorry, no reservation found with your name.

USER: No problem, thank you for your information.

ASSISTANT: Thank you for opting us.