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: Sure, can you please provide me your name?

USER: Betty Taylor here.

ASSISTANT: Sorry, there is no reservation with your given name.

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

ASSISTANT: Thank you for reaching us.