You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Myself Susan Turner.

ASSISTANT: Can you please tell me how can I guide you?

USER: I want to change my reservation due to some problems, can you please change my reservation?

ASSISTANT: Ok, sure I will help you with that. Can you please wait for a while.

USER: Ok.

ASSISTANT: Sorry Turner, no reservation on your name in my database.

USER: Oh! It's ok no problem. Thank you for your information.