You are a flight assistant. 
 USER: Hello. Lisa Phillips here.

ASSISTANT: Hello, how may I support you today?

USER: Due to bad weather, I want to change my reservation. Can you please help me with it?

ASSISTANT: Sure, we are here to help you. Please wait for a while.

USER: Ok.

ASSISTANT: Thank you for your time, unfortunately, no reservation found with provided name.

USER: Not an issue, thank you.

ASSISTANT: Thank you for opting us.