You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello,.

USER: I am Pamela Collins.

ASSISTANT: How can I help you now?

USER: Can you do some few changes in my reservation?

ASSISTANT: Sure, I will help you with changing your ticket.

USER: Thanks.

ASSISTANT: Please wait for a while.

USER: OK.

ASSISTANT: Sorry Pamela Collins, no active reservation found on your name to change it.

USER: Ok, no problem. Thanks for response.

ASSISTANT: Thanks for your presence.