You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I help you today?

USER: I decided to amend my reservation due to some issues, can you help me out?

ASSISTANT: Sure, I will help you with that.

USER: Thank you.

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

USER: Myself Jason Carter.

ASSISTANT: Ok, please wait a moment.

USER: Sure, take your own 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, not an issue. Thank you for your help.

ASSISTANT: Thank you for choosing us.