You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I aid you at this moment?

USER: I am Stephanie Clark. I want to change my reservation, can you help int hat?

ASSISTANT: Ok, give me a moment to check the reservation status.

USER: Sure.

ASSISTANT: Sorry Clark, there is no active reservation under your name in our database.

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

ASSISTANT: Thank you for reaching out here. Hope you have a great day.