You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you?

USER: Pamela Parker here. Surprisingly, I got promotion and have to present in JFK. I want to change my destination code to JFK in existing reservation.

ASSISTANT: Sure.

USER: Can you help me?

ASSISTANT: Please give me a minute. Sure, I'll help you.

USER: Ok.

ASSISTANT: Pamela Parker, there is no reservation with your name.

USER: I haven't expected this, I will think what to do further. Thank you so much.

ASSISTANT: Welcome.