You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. What help are you seeking from our agency?

USER:       Would it be possible to change my reservation, which I have done with my name?

ASSISTANT: Sure, I am here to help you. Can you please mention your name to check with your booking status.

USER: Thank you, my name is Michelle Martinez.

ASSISTANT: Please be on hold for a moment.

USER: Sure, take your time.

ASSISTANT: Michelle Martinez, I am very apologetic to inform you this news, but there is no active reservation found by your name in our reservation list.

USER: That's fine, thank you for the response.

ASSISTANT: Thank you for choosing our agency services.