You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: My name is Linda Phillips.

ASSISTANT: How may I assist you today?

USER: I want to make some changes in my existing reservation, can you please help?

ASSISTANT: Sure, please wait a moment, let me check with your details.

USER: Sure.

ASSISTANT: Sorry, there are no active reservations on your given name to change.

USER: No worries, thank you for information.

ASSISTANT: Thank you for reaching our service.