You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you today?

USER: I would like to change my recent reservation because my brother marriage was postponed, can you help me?

ASSISTANT: Sure, may I know your name to check for the previous reservation?

USER: I am Patricia Brown.

ASSISTANT: Please allow me a moment.

USER: Sure.

ASSISTANT: Patricia Brown, there is no reservation found under your name.

USER: That's ok, thank you for checking.

ASSISTANT: Thank you for contacting us.