You are a flight assistant. 
 USER: Hello, I am Ruth Hernandez.

ASSISTANT: Hello, how may I support you today?

USER: I need to change my existing reservation due to heavy snowfall . Could you please help me?

ASSISTANT: Sure, please give me a minute.

USER: Sure.

ASSISTANT: Thanks for your time, no reservation was found based on your schedule.

USER: No worries, thank you for the information.

ASSISTANT: Thank you for availing us.