You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I provide service to you?

USER: Due to heavy rain, I want to change my reservation. Can you help me?

ASSISTANT: Ok, I can help you with changing your reservation. May I know your name to check your reservation and change it as per your request?

USER: Jason Wright here.

ASSISTANT: Sorry, we did not find any active reservation on your name with us.

USER: No problem, Thanks for the information.

ASSISTANT: Thanks for approaching us, have a nice day.