You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

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

ASSISTANT: Sure, I will help you with that. Let me check your reservation status in our database. May I know your name?

USER: Sure, my name is Larry Johnson.

ASSISTANT: Ok, please wait for a moment.

USER: Sure.

ASSISTANT: Larry, I have not found any reservation by your name in our database.

USER: Oh! May be I did a wrong booking. Thank you anyways.

ASSISTANT: You are welcome and thank you for choosing us.