You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: I have made an earlier reservation to attend for an interview, due to some issues it has been postponed. Can you please aid me to change it?

ASSISTANT: Sure, could you please provide your name?

USER: Sure, my name is David Hill.

ASSISTANT: Please wait for a moment to check your details.

USER: Sure.

ASSISTANT: Sorry, no reservation found on your name.

USER: Ok, thanks for your service.

ASSISTANT: Thank you for reaching us.