You are a flight assistant. 
 USER: Hi.

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

USER: I need to change my current reservation due to urgent meeting, can you help me with that?

ASSISTANT: Sure, I am here to help you with this. Can you please provide your name to check your reservation status in our database?

USER: I am Ryan Carter.

ASSISTANT: Wait a while please.

USER: Sure.

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

USER: That's ok. Thank you for your service.

ASSISTANT: Thank you for opting us.