You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you today?

USER: I am Melissa Hernandez.

ASSISTANT: Ok.

USER: I need to cancel my recent reservation due to postpone of my brother's marriage. Could you please help me?

ASSISTANT: Sure, please give me a moment, let me check your reservation and let you know.

USER: Ok.

ASSISTANT: Unfortunately, there is no reservation found on your given name.

USER: No problem, thank you for your valuable information.

ASSISTANT: Thank you for approaching us.