You are a flight assistant. 
 USER: Hi, I am Kevin Edwards.

ASSISTANT: Hello, how may I assist you?

USER: As I am not issued with leave during my journey schedule I want to change my existing reservation, can you help me with it?

ASSISTANT: Ok, I can help you with it. Let me check the status and revert you.

USER: Ok.

ASSISTANT: There is no reservation found with your name.

USER: That's ok, thank you for the response.

ASSISTANT: Thank you for approaching us.