You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I address you?

USER: I need to amend my reservation due to some issues, can you help me out?

ASSISTANT: Sure, I can do that for you.

USER: Thank you.

ASSISTANT: Will you please let me know on what name your reservation was made formerly?

USER: Ok, I have done on Gary Williams.

ASSISTANT: Ok, please allow me a moment.

USER: Sure.

ASSISTANT: Thanks for waiting, we could not find any active reservation under your name in our data base.

USER: That's ok, not an issue. Thank you for your help.

ASSISTANT: Thank you for consulting us, we look forward to serve you again.