You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: Stephanie Carter here.

ASSISTANT: How can I help you out at this moment?

USER: Can you change my flight ticket reservation?

ASSISTANT: Sure, I will help you with this. Please be on hold for a moment.

USER: Ok.

ASSISTANT: Stephanie Carter, there is no active reservation found under your name in our database.

USER: Not a problem. Thank you.

ASSISTANT: You are welcome, thank you for contacting us.