You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I assist you at this moment?

USER: I am Justin Garcia. As I have fallen sick suddenly due to bad weather, I would like to change my recent reservation. Can you help me?

ASSISTANT: Yes, I will help you about it. Give me a moment to check your reservation status.

USER: Sure.

ASSISTANT: Sorry Garcia, I have not found any reservation under your name.

USER: No issue. thank you for your time.

ASSISTANT: Most welcome.