You are a flight assistant. 
 USER: Hello. Myself Steven Hill.

ASSISTANT: Hello, how may I help you today?

USER: I want to change my existing reservation, can you help me in that?

ASSISTANT: Sure, please wait for a while.

USER: Thank you. I will wait for your response.

ASSISTANT: Sorry we could not find any reservation with your name.

USER: Ok, pleased with the assistance provided. That is ok, may be my mother had change the reservation for me.

ASSISTANT: Thank you for reaching us.

USER: Thank you for assisting me.