You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, How may I amend you today?

USER: I am Dorothy Hall.

ASSISTANT: Ok.

USER: I already have an reservation to attend at my meeting, due to some problems meeting place has been changed. So I need a few changes in my reservation.

ASSISTANT: Ok.

USER: Can you help me?

ASSISTANT: Sure.

USER: Thank you.

ASSISTANT: Please hold on for sometime, I will let you know.

USER: Sure.

ASSISTANT: Your reservation is not found in our database.

USER: No problem. Thank you.

ASSISTANT: Thank you for reaching us.