You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I address you?

USER: Due to some issues, I am willing to change my existing reservation. Can you please help me with this?

ASSISTANT: Sure, will you please let me know your name?

USER: I am Larry Carter.

ASSISTANT: Ok, please allow me a minute to check the status of your formerly made reservation.

USER: Sure.

ASSISTANT: Thanks for waiting, there is no reservation found active under your name.

USER: That's ok, thank you.

ASSISTANT: Thank you for choosing us.