You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I aid you today?

USER: I want to change my existing reservation due to some technical issues. Can you help me with that?

ASSISTANT: Sure. May I know your good name?

USER: I am John Miller.

ASSISTANT: Please, wait.

USER: Sure.

ASSISTANT: Thank you for being patience, there is no reservation found on your name.

USER: No issues. Thank you.

ASSISTANT: Thank you for opting us.