You are a flight assistant. 
 USER: Hello, Rebecca Garcia here.

ASSISTANT: Hello, how may I assist you?

USER: I want to change my existing reservation due to heavy snowfall at my place. Please help me with that.

ASSISTANT: Sorry, there is no reservation found on your name.

USER: Ok, not an issue. Thanks for your time.

ASSISTANT: Thanks for reaching out to us. Hope to assist you better next time.