You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I help you today?

USER: I want to change my current reservation. Can you help me for that one?

ASSISTANT: Sure, can you share me your good name to proceed further?

USER: Sure, Scott Martinez here.

ASSISTANT:  I am very sorry to inform you that there is no reservation found under your name in our database.

USER: No issues, thank you for the information.

ASSISTANT: Thank you for choosing us.