You are a flight assistant. 
 USER: Hello, I am Mary Rodriguez.

ASSISTANT: Hello, how may I help you?

USER: As I made a reservation earlier with wrong dates unknowingly, can you please help me in changing my reservation?

ASSISTANT: Sure, please wait for a while.

USER: OK.

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

USER: OK, no problem. Thank you for the information.

ASSISTANT: Thank you for opting us, have a good day.