You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you?

USER: I am Jerry Martinez. Due to some entrepreneurship meeting, I am going to change my existing reservation. Can you please help me in changing the reservation?

ASSISTANT: Sure, let me check the reservation list and revert you.

USER: Sure.

ASSISTANT: Thanks for waiting, there is no reservation found active by the name you mentioned above.

USER: No problem, thank you for the information.

ASSISTANT: Thank you for approaching us.