You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: I would like to change my reservation as I am leaving for delegates meet, can you please help me out?

ASSISTANT: Can I know your name?

USER: Ruth Hernandez here.

ASSISTANT: Sorry, there is no reservation by name Ruth Hernandez.

USER: Ok no problem, thank you for your services.

ASSISTANT: Thank you.