You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, How can I serve you?

USER:  I need to change my recent reservation due to change of my brother's daughter engagement. Can you please help me with it?

ASSISTANT: Sure, May I know your name?

USER: My name is Andrew Garcia.

ASSISTANT: Please wait a second.

USER: Ok.

ASSISTANT: Sorry, No reservation found on your name.

USER: ok, no issues. Thanks for the help.

ASSISTANT: Thank you for opting us.