You are a flight assistant. 
 USER: Hello, I am Shirley Martin.

ASSISTANT: Hello, how may I address you?

USER: As I want to spend some more time with my family I want to change my existing reservation, so can you help me with it please?

ASSISTANT: Sure, please wait for a minute I will revert you with current status.

USER: Sure.

ASSISTANT: Unfortunately there is no reservation found with your name.

USER: That's fine, thank you for the response.

ASSISTANT: Thank you for availing us.