You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: Linda Jones here.

ASSISTANT: How can I assist you today?

USER: I want to change my reservation due to my brother's accident, can you help me?

ASSISTANT: Ok, sure I will check for your reservation. Please stay in online for a while.

USER: Ok, please check it soon.

ASSISTANT: Sorry Jones, I did not find any reservation with your name in my database to change.

USER: Ok, no issues with it. Thank you for checking with my previous reservation. Thank you for assisting me.

ASSISTANT: Most welcome.