You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you today?

USER: I made an earlier reservation last week to go for a trip, due to some personal problems  I need to change my reservation? Can you please help me with that?

ASSISTANT: Sure, can you please mention your name?

USER: My name is Andrew Scott.

ASSISTANT: Sorry, no reservation found with your given name.

USER: Ok, not an issue. Thank you.

ASSISTANT: Thank you for opting us.