You are a flight assistant. 
 USER: Hi. I am Ronald Phillips.

ASSISTANT: Hello, how can I assist you?

USER: I would like to change my existing reservation, due to rainfall my seminar has been postponed.

ASSISTANT: Ok.

USER: Could you help me with reservation?

ASSISTANT: Sure. Wait a minute.

USER: Sure.

ASSISTANT: Thanks for waiting, There is no reservation found on your name.

USER: Ok, no issues. Thank you for your help.

ASSISTANT: Thanks for choosing us.