You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

USER: I want to modify my reservation due to some issues going on in my location. Can you help me out?

ASSISTANT: Sure, please help me with your name to check your details.

USER: Myself Daniel Roberts.

ASSISTANT: No reservation found on your name. Sorry for inconvenience.

USER: That's ok, no problem. Thank you for your help.

ASSISTANT: Thank you for choosing us, have a nice day.

USER: Welcome.