You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I help you?

USER: I want to do some correction to my recent reservation, can you please assist me with that?

ASSISTANT: Sure, I will help you to change your reservation. Please mention your name to check your previous reservation.

USER: Myself,  Andrew Smith.

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

USER: That's ok, thank you for checking.

ASSISTANT: Welcome, have a nice day.