You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Kevin Lopez.

ASSISTANT: How may I guide you?

USER: I would like to change my recent reservation due to heavy snow fall, can you help me?

ASSISTANT: Kevin Lopez, I am here to help you for this. Let me check your reservation status in our records.

USER: Thank you.

ASSISTANT: Sorry for inconvenience, no reservation is found with your criteria.

USER: That's ok, thank you for checking.

ASSISTANT: You are welcome, thank you very much for approaching our agency.