You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I assist you today?

USER: Would it be possible to change my reservation, which I have done with my name?

ASSISTANT: Sure, I will help you with that.

USER: Thank you.

ASSISTANT: Let me know your name to check your reservation?

USER: Sure, my name is Jacob Jackson.

ASSISTANT: Ok, please wait a moment, let me search a flight for you.

USER: Ok, take your time.

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 the response.

ASSISTANT: Thank you for choosing us.