You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I aid you today?

USER: I am Timothy Garcia, can you help me to change my reservation?

ASSISTANT: Sure, I will help you with that, please hold on for a moment to check your reservation status.

USER: Sure, please check my details in our records.

ASSISTANT: Garcia, I did not find any reservation with your name in my database.

USER: Ok, thank you for your time.

ASSISTANT: Thank you for reaching us.