You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Sarah Hill.

ASSISTANT: Sarah, how can I help you?

USER: Due to some issues I just want to cancel my reservation. Can you help me out?

ASSISTANT: Ok, let me check your details. I will help you. Sarah, there is no reservation found under your name.

USER: Thank you for your help.

ASSISTANT: Thank you for reaching us.