You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I be at your service?

USER: I am Stephanie Thompson. I want to change my reservation, can you help me to modify my active reservation?

ASSISTANT: Sure, let me go through the reservation list and get back to you.

USER: Ok.

ASSISTANT: We could not find any reservation by the name you provided.

USER: Ok, thanks for informing me.

ASSISTANT: Thank you for reaching us.