You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: Scott Hernandez here.

ASSISTANT: How can I help you?

USER: Can you change my flight ticket reservation?

ASSISTANT: Sure, I'll change that. Please be on hold.

USER: Ok.

ASSISTANT: Scott, there is no reservation found under your name to do changes in that.

USER: Not a problem. Thank you.

ASSISTANT: Thank you for choosing us.