You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I guide you today?

USER: I am Nicholas Garcia.

ASSISTANT: Hello Garcia.

USER: I want to change my recent reservation due to some modifications in my project, will you please help me out?

ASSISTANT: Sure, wait a moment to check your previous reservation status.

USER: Ok, take your time.

ASSISTANT: Sorry Garcia, there is no reservation found under your name in our records.

USER: That's ok, thank you for the information you have provided.

ASSISTANT: Ok, thank you for choosing us, have a great day.