You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I support you?

USER: Due to inconvenience of my work, I want to change my reservation. Can you please help me for that?

ASSISTANT: Sure, may I know your name please?

USER: My name is Edward Thompson.

ASSISTANT: Please standby.

USER: Ok, I will wait.

ASSISTANT: Thank you for your time, we did not find any active reservation on your name in our database.

USER: Anyway, thanks for the information.

ASSISTANT: Thank you for reaching us.