You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you?

USER: I am Deborah Campbell from Las Vegas. I want to change my travel dates in my previous reservation, can you please change my travel dates?

ASSISTANT: Ok, please wait.

USER: Ok.

ASSISTANT: Thank you for waiting, sorry no reservation found on your name to change.

USER: Oh! It's ok no problem. Thank you for your service.

ASSISTANT: It's my duty, thank you for connecting with us.