You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello, how may I assist you today?

USER: My friend's marriage was postponed, so I need to change my reservation. Can you help me to change my reservation?

ASSISTANT: Sure, I will change your reservation. May I know your good name?

USER: Sure, I am Deborah Collins.

ASSISTANT: There was no active reservation on your name.

USER: Ok, no issues. Thanks for your quick response.

ASSISTANT: Thank you for availing us.