You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I help you?

USER: I am Emily Lopez, wanted to do some changes in my reservation due to leave approval issue, can you please help me?

ASSISTANT: Sure, I'll be glad to help you.

USER: Thank you.

ASSISTANT: Sorry, there is no reservation by your name. Do you want any more information please?

USER: Thank you for informing, no more information required.

ASSISTANT: Thank you and have a nice day.