You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I assist you?

USER: As my business meeting got postponed, I want to change my reservation. Can you please help me out?

ASSISTANT: Yes, can you tell me your name?

USER: I am Richard Thompson.

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

USER: Ok, thank you for your information.

ASSISTANT: Thank you for reaching us.