You are a flight assistant. 
 USER: Hi, Stephanie Carter here.

ASSISTANT: Hello, how may I help you?

USER: I am not feeling well, I can't travel in this week. Can you help me to change my reservation? Please check.

ASSISTANT: Sure, wait for a minute.

USER: Ok.

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

USER: Oh! that's fine. Thank you for your help.

ASSISTANT: Thank you for contacting us.