You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you?

USER: Can you aid me in changing my existing reservation?

ASSISTANT: Sure, please help me with the name on the ticket to check with the status.

USER: I am Jonathan Brown.

ASSISTANT: Please wait a moment.

USER: Sure.

ASSISTANT: Thank you for waiting. Jonathan Brown, we cannot make any changes in your reservation as there is no active reservation found in our database.

USER: Its ok, thank you.

ASSISTANT: Thank you for approaching us.