You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I assist you today?

USER: I want to change my reservation, can you help me with that?

ASSISTANT: Sure, will you mention your name please?

USER: Kathleen Lopez here.

ASSISTANT: Please give me a moment.

USER: Sure.

ASSISTANT: There is no reservation found under your name.

USER: Ok, thank you.

ASSISTANT: Welcome, have a great day.