You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you today?

USER: Can you please help me to change my reservation to other dates?

ASSISTANT: Sure, I will help you. Please help me with your name.

USER: Sure, my name is Richard Collins.

ASSISTANT: Please allow me a minute.

USER: Sure.

ASSISTANT: Richard Collins, I am really sorry to inform you that there is no reservation found on your name.

USER: No worries, thank you.

ASSISTANT: Thank you for understanding. Thank you for reaching us. Have a great time.