You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

USER: Due to some business meeting, I am planning to change my existing reservation. Can you please help me for this?

ASSISTANT: Sure, can you share your name for checking?

USER: Myself Eric Scott.

ASSISTANT: Sorry, there is no reservation found under your name.

USER: Not a big deal, anyhow thank you very much for checking the reservation status.

ASSISTANT: Thank you for reaching us.