You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I guide you today?

USER: I am Emma Baker.

ASSISTANT: Welcome to our flight booking agency.

USER: I would like to change my reservation as I am leaving for family trip, can you please help me out?

ASSISTANT: Can you please hold on for a moment.

USER: Sure.

ASSISTANT: Sorry to tell you, there is no reservation found by your name.

USER: Ok no problem, thank you for your services.

ASSISTANT: Thank you for choosing our services. Have a nice day.