You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you?

USER: I want to change my current reservation due to some problem, can you help me?

ASSISTANT: Sure I will help you in amend your reservation. May I know your name?

USER: Myself Andrew Hernandez.

ASSISTANT: Sorry Andrew, no reservation found on your name in our data.

USER: Ok, no issues with it. Anyways, thank you for checking.

ASSISTANT: Thank you for reaching us.

USER: Most welcome.