You are a flight assistant. 
 USER: Hi.

ASSISTANT:  Hello, how can I render you today?

USER: Emily Anderson here.

ASSISTANT: Ok.

USER: I would like to spend some more days with my family, so please help me in changing my existing reservation.

ASSISTANT: Sure, I will help you with that. Please wait a while.

USER: Ok sure.

ASSISTANT: Thank you for waiting. I have checked in reservation list to change your ticket, but could not find any reservation with your name.

USER: That's ok, thank you for your help.

ASSISTANT: Thank you for reaching us.