You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, How can I assist you?

USER: Can you please help me out in changing my existing reservation?

ASSISTANT: Sure, May I know your name?

USER: Thank you for considering my request. My name is Amanda Martin.

ASSISTANT: Please wait a moment.

USER: Sure, I will wait for your response.

ASSISTANT: Sorry, No reservation found on your name.

USER: That's ok, no problem. Anyway, thank you for giving the information.

ASSISTANT: Thank you for availing us.