You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I assist you today?

USER: I have planned to go for party unfortunately the party was postponed, can you please help me to change my existing reservation?

ASSISTANT: Yes sure. Let me know your name to check?

USER: Myself Anna Adams.

ASSISTANT: Sorry for inconvenience. There is no reservation found for this search.

USER: Ok, fine. Thank you for searching in your database.

ASSISTANT: It's my pleasure.