You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, do you need any help from us?

USER: Myself Eric Lopez. I need to modify my reservation which I have done long back due to weather conditions. Can you please help me out?

ASSISTANT: Nice to meet you Lopez. Sure, please allow me a moment.

USER: Thank you. Sure, take your time.

ASSISTANT: Sorry, there is no reservation with your name in our portal to make changes further.

USER: Not an issue, thank you for the help anyways.

ASSISTANT: You are welcome.