You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you today?

USER: I am Timothy Moore. Due to sudden work, I need to change my reservation. Can you please help me with it?

ASSISTANT: Sure, please wait for a minute.

USER: Ok.

ASSISTANT: I could not find any reservation with your name in our database.

USER: Ok, not an issue. Thank you.

ASSISTANT: My pleasure.