You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you?

USER: My wedding got postponed, so I want to change my reservation.

ASSISTANT: Sure, I am happy to help you. May I know your name for checking?

USER: My name is Jessica Miller.

ASSISTANT: Thank you for waiting, there is no reservation found for the user name which you have provided.

USER: It's ok, thank you for the information.

ASSISTANT: Thank you for reaching us, have a nice day.