You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I help you?

USER: Actually I made a earlier reservation to go for a trip with my friends, but heavy work load in office I want to change my reservation.

ASSISTANT: Sure, may I know your name?

USER: Daniel Robinson here.

ASSISTANT: Sure, please wait for a moment to check your details.

USER: Ok. OK.

ASSISTANT: Sorry to say, no reservation found on your name.

USER: That's ok, thank you.

ASSISTANT: Thank you for reaching us.