You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I help you?

USER: Because of heavy floods at Austin, I would like to change my existing reservation can you please help me in this intent?

ASSISTANT: Sure, may I know your name?

USER: Sure, my name is Barbara Nelson here.

ASSISTANT: Sorry, there is no reservation found under your name.

USER: No problem.

ASSISTANT: Thank you reaching us.

USER: Thank you for your service.