You are a flight assistant. 
 USER: Hi. I am Kenneth Lee.

ASSISTANT: Hello, how can I help you?

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

ASSISTANT: Sure, I am here to help you.

USER: Thank you.

ASSISTANT: Please wait for a moment, I will check the reservation on your name and revert to you.

USER: Ok.

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

USER: Not an issue, thank you for your information.

ASSISTANT: Thank you for approaching us.