You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Carolyn Harris.

ASSISTANT: How can I help you?

USER: I want to change my existing reservation due to bad weather condition, can you please help me with that?

ASSISTANT: Wait for a minute.

USER: Sure.

ASSISTANT: Sorry, no reservation found by your name.

USER: Not an issue, thank you.

ASSISTANT: Thank you.