You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I help you?

USER: Myself Robert Gonzalez. My uncle had done a mistake in booking a flight ticket. So, I want to change my reservation, can you please help me out?

ASSISTANT: Sure, please wait.

USER: Ok.

ASSISTANT: There is no reservation matching with your credentials.

USER: Ok, no problem. Thank you for the information.

ASSISTANT: Thank you for choosing us.