You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you today?

USER: I need you to make few changes in my recent booking, please help me.

ASSISTANT: Sure, will you mention your name please?

USER: My name is Jeffery Miller.

ASSISTANT: Please give me a moment.

USER: Sure, take your time.

ASSISTANT: There is no reservation found under your name.

USER: That's ok. Thank you.

ASSISTANT: Welcome, have a great day.