You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you today?

USER: I am Christine Smith.

ASSISTANT: Yes Smith.

USER: I would like to change my reservation as my mother got hospitalised, can you please help me out?

ASSISTANT: Sure, I will help you with that, please hold on for a moment to check your reservation status.

USER: Thank you.

ASSISTANT: Smith, I did not find any reservation with your name in my database.

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

ASSISTANT: It's my pleasure.