You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I assist you?

USER: I am Andrew Williams. Can you please help me in changing my recent reservation?

ASSISTANT: Sure, I am here to help you. Please wait a moment, I will check your reservation status.

USER: Ok, sure take your own time.

ASSISTANT: Andrew, no reservation has been found on your name in our database.

USER: Ok, fine thank yo for checking.

ASSISTANT: Thank you for approaching us.