You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello,In what way shall I assist you for the day?

USER: Can you change my existing reservation by the name Donald Taylor?

ASSISTANT: Sure, I will help you with that.

USER: Thank you.

ASSISTANT: Please wait for a moment, I will check the status of your reservation and let you know.

USER: Sure.

ASSISTANT: Thank you for waiting, We found that there was no reservation on your name.

USER: Ok, No issues. Thank you.

ASSISTANT: Thank you for reaching us.