You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I help you today?

USER: Owing for an emergency, I want to change my flight reservation. Can you please help me?

ASSISTANT: Ok, I am here to help you with that.

USER: Thank you.

ASSISTANT: May I know your good name?

USER: I am Jessica Miller.

ASSISTANT: Please wait for a minute.

USER: Sure.

ASSISTANT: Sorry to say that, there is no reservation found on your name in our database.

USER: Not an issue. Thank you for checking.

ASSISTANT: Thank you for approaching us.