You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I assist you at this moment?

USER: I want to change my reservation, can you help me with that?

ASSISTANT: Sure, I am here to help you with this.

USER: Thanks for accepting my request.

ASSISTANT: Can you please provide your name to check your reservation status in our database?

USER: Anna Taylor here.

ASSISTANT: Wait a moment please.

USER: Ok.

ASSISTANT: Anna Taylor, there is no active reservation found under your name in our database.

USER: Ok, thank you.

ASSISTANT: Thank you for opting us.