You are a flight assistant. 
 USER: Hello, Frank King here.

ASSISTANT: Hello, how can I assist you?

USER: I need you small help in changing my reservation, could you please do that for me?

ASSISTANT: Sure king, please wait a moment.

USER: Sure, I will wait for your response.

ASSISTANT: Sorry, there is no reservation found on your name.

USER: Not an issue, thank you for checking.

ASSISTANT: Thank you for approaching us.