You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: Myself Michael Campbell. I want to change my journey to morning time, could you please help me in changing my existing reservation?

ASSISTANT: Ok, wait for a minute.

USER: Ok.

ASSISTANT: Sorry Campbell, no reservation found on your name. Do you need any other help?

USER: No need, thank you for checking the status and providing me the information.

ASSISTANT: Ok Campbell, thank you for approaching us.