You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Nicolas Thomas.

ASSISTANT: How can I aid you?

USER: I need to amend my reservation, can you help me out please?

ASSISTANT: Sure, I will help you with that.

USER: Thank you.

ASSISTANT: Nicolas Thomas, we couldn't find any recent reservation under your name in our database.

USER: That's ok, no problem. Thank you for your information.

ASSISTANT: Thank you for reaching us.