You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you?

USER: I am Steven Nelson. As my plan to go for holiday trip got postponed, I want to change my reservation. Can you please help me?

ASSISTANT: Sure, we are here to help you.

USER: Thank you.

ASSISTANT: Please give me a moment to check your details.

USER: Sure.

ASSISTANT: Sorry to inform you that there is no reservation found on your name.

USER: It's ok, thank you for your information.

ASSISTANT: Thank you for reaching us.