You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you?

USER: Due to a lot of fog, I need to change my reservation. Can you help me with that?

ASSISTANT: Sure, please wait a while.

USER: Ok.

ASSISTANT: Thanks for waiting. We didn't found any reservation.

USER: Ok, no issues.

ASSISTANT: May I know your name?

USER: Stephanie Carter is my name. Thanks for the assistance.

ASSISTANT: Thank you for contating us.