You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you today?

USER: Can you please help me in changing my recent reservation? As I have an important meeting to attend on my previous planned trip dates.

ASSISTANT: Sure, I am here to help you out. Please provide me your name.

USER: Sure, my name is Benjamin Walker.

ASSISTANT: Sorry Benjamin Walker, there is no reservation on your name in our database.

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

ASSISTANT: Thank you for reaching us.