You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, What type of service your looking for?

USER: I would you like to make some few changes in my previously booked ticket. Can you please help me in this?

ASSISTANT: Sure, we are here to help you.

USER: Thank you.

ASSISTANT: Could I just have your name, please?

USER: I am Rachel Carter.

ASSISTANT: Please wait for a while.

USER: Ok.

ASSISTANT: Sorry to say that, there is no active reservation found on your name to change.

USER: No issues, thank you for your help.

ASSISTANT: Thank you for opting us.