You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: I need to change my reservation due to my planned event got postponed so please help me with that.

ASSISTANT: Sure, I am happy to help you. Can you please tell me your name?

USER: Sure, myself Karen Edwards.

ASSISTANT: Sorry, there is no reservation with your name to change further.

USER: Oh! It might not be booked properly. Anyway, thank you for your time.

ASSISTANT: Thank you.

USER: Most welcome.