You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I help you?

USER: Can you please help me in changing my reservation?

ASSISTANT: Sure, I am here to help you. May I know your name to proceed further?

USER: Thank you, I am Dennis Gonzalez.

ASSISTANT: Ok, please wait for a while.

USER: Ok.

ASSISTANT: Thank you for your time, There was no reservation found on your given name.

USER: Ok, no problem. Thank you.

ASSISTANT: Thank you for choosing us.