You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I help you today?

USER: Can you change my flight ticket reservation?

ASSISTANT: Sure, I will help you with that. Can you please tell me your name?

USER: Robert Adams here.

ASSISTANT: Please wait a moment, let me check your reservation status.

USER: Sure.

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

USER: Not a problem. Thank you.

ASSISTANT: Thank you for reaching us, have a nice day.