You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: Is this a Flight Booking Agency?

ASSISTANT: Yes, I'm here to help you.

USER: Yesterday night I have reserved a ticket to New York but I didn't get any confirmation details from your agency. Can you please check my reservation details and help me in changing my reserved dates?

ASSISTANT: Sure, but let me know your name please to change your reservation?

USER: Sure, myself Donald Hernandez.

ASSISTANT: Ok, please wait for a mean while. Sorry Donald, there is no reservation found on your name to change your reservation. Thank you for contacting us.

USER: It's ok. Thank you for the information.