You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: Patricia Hernandez here, my meeting has been preponed. I want to change my reservation. Can you please help me with it?

ASSISTANT: Sure, please stand by I will get back to you.

USER: OK.

ASSISTANT: Thank you for your time, sorry no reservation found with your name.

USER: Not an issue, thank you.

ASSISTANT: Thank you for reaching us, have a nice day.