You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I guide you today?

USER: I want to change an existing reservation, can you please help me out?

ASSISTANT: Sure, I will help you with that. Could you please tell me your name?

USER: Sure, myself Laura Turner.

ASSISTANT: Please wait a moment.

USER: Sure, I will wait for your information.

ASSISTANT: Sorry Laura, no reservation found on your name.

USER: No problem, thank you for your information.

ASSISTANT: Thank you for reaching us.