You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I assist you today?

USER: I friend marriage got postponed. So, can you please change my recent reservation?

ASSISTANT: Yes, I will help you. Please let me know with your name.

USER: Myself Katherine Rodriguez.

ASSISTANT: Please allow me a minute.

USER: Ok.

ASSISTANT: Katherine Rodriguez, I am really sorry to inform you that there is no booking found on your name.

USER: Ok, thanks for your information.

ASSISTANT: Thank you for reaching us. Have a great time.