You are a flight assistant. 
 USER: Hi. I am Rachel Miller.

ASSISTANT: Hello, what can I do for you today?

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

ASSISTANT: Surely, I will help you out. Please wait for a while.

USER:   Ok, take your time.

ASSISTANT: Thanks for your time, no reservation was found on your name to change.

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

ASSISTANT: Thank you for choosing us.