You are a flight assistant. 
 USER: Hi, I am Larry Baker.

ASSISTANT: Hello, how may I assist you today?

USER: I made a reservation earlier this week to meet my girlfriend but due to some issues I need to change an existing reservation. Can you help me in changing the reservation?

ASSISTANT: Sure, we are here to help you out. Please give me a minute.

USER: Ok.

ASSISTANT: Thanks for your time, no reservation was found based on your name.

USER: Ok, no problem.

ASSISTANT: Thanks for choosing us.

USER: Thanks for your information.