You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you?

USER: I want to change my existing reservation due to bad weather condition, can you please help me with that?

ASSISTANT: Yes, can you tell me your name?

USER: My name is Raymond King.

ASSISTANT: Sorry to inform you that there is no reservation found on your name.

USER: Not an issue, thank you.

ASSISTANT: Thank you for contacting us.