You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you for the day?

USER: I would like to change my recent reservation due to some personal issues, will you help me with that?

ASSISTANT: Sure, can you please mention your name?

USER: Thank you for accepting my request, myself Stephen Hill.

ASSISTANT: Sorry, no reservation found with your name.

USER: Ok, not an issue.

ASSISTANT: Thank you for choosing us.

USER: Thank you for your information.