You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I help you?

USER: I need to change my existing reservation, Can you please help me with that?

ASSISTANT: Sure, I am here to help you with your concern. Can you please let me know your name to check with the status?

USER: Kenneth Baker here.

ASSISTANT: Thank you for providing your name to check with the status. Please wait for 2-3 minutes while I check.

USER: Sure.

ASSISTANT: Thank you for waiting, Kenneth Baker. Regret to inform that there is no active reservation found under your name to amend.

USER: Ok, no problem. Thanks for your information.

ASSISTANT: Thank you for reaching us.