You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Nicholas Lopez.

ASSISTANT: In which way I can aid you today?

USER: Please help me in changing my recent reservation.

ASSISTANT: Sure, I am happy to aid you with that. Please wait a moment, I will check your previous reservation status.

USER: Sure.

ASSISTANT: There is no previous reservation available under your name.

USER: Ok, No issues. Thank you.

ASSISTANT: Thank you for reaching us.