You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. Glad to meet you.

USER: I want to change my reservation because I have committed a mistake while booking a ticket. Could you help me out?

ASSISTANT: Sure, can you guide me with your name so I can find the any reservation on your name?

USER: Jerry Nelson here.

ASSISTANT: Based on your name there is no reservation on your name.

USER: Not a problem. Thank you for your help.

ASSISTANT: You are welcome.