You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: Can you aid me in changing my recent reservation, which I had done before?

ASSISTANT: Sure, let me know your name please?

USER: Myself Jerry Phillips.

ASSISTANT: Give me a moment.

USER: Sure, take your time.

ASSISTANT: Jerry Phillips, Sorry to inform that there is no reservation by your name.

USER: That's ok, thank you for checking.

ASSISTANT: Thank you for reaching us.