You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I help you?

USER: Can you please help me in changing my recent reservation?

ASSISTANT: May I know your name please?

USER: Sure, My name is Janet Jackson.

ASSISTANT: Sorry to say, there is no reservation on your name in our database.

USER:  Oh! May be I have done a wrong reservation, Anyways thank you for the information.

ASSISTANT: Thank you for opting us.