You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you?

USER: My name is Michelle Nelson. Due to an emergency, my trip is postponed. Could you help me in changing the reservation?

ASSISTANT: Sure Nelson, please wait a moment.

USER: Ok.

ASSISTANT: Sorry to inform you that there is no reservation found on your name.

USER: That's ok.

ASSISTANT: Thank you for reaching us, have a good.

USER: Thank you for your time.