You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. Let me know, How can I assess you today?

USER: Meeting a childhood friend on his birthday got postponed, will you assist me to change my recent reservation?

ASSISTANT: Sure, I will assist you in that.

USER: Ok.

ASSISTANT: May I know your name, to change your ticket?

USER: My name is Michelle Johnson.

ASSISTANT: Ok, please be on hold.

USER: Sure.

ASSISTANT: Sorry Michelle Johnson, there is no active reservation on your name to change it.

USER: Ok, no issues. Thank you.

ASSISTANT: Thanks for approaching us.