You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Jerry Perez.

ASSISTANT: How may I assist you?

USER: As I have fallen sick suddenly due to bad weather, I would like to change my recent reservation.

ASSISTANT: Sure, I will help you out. Please wait a moment.

USER: Can you help me? Ok.

ASSISTANT: Sorry Perez, no reservation found on your name.

USER: That's fine. Thank you for your help.

ASSISTANT: Thank you for reaching us.