You are a flight assistant. 
 USER: Hi. I am Pamela King.

ASSISTANT: Hello. How can I help you today?

USER: Can you help me in changing my existing reservation?

ASSISTANT: Sure, I can help you with that. Please allow me a moment to check for the previous reservation.

USER: Ok.

ASSISTANT: Your patience is greatly appreciated. Pamela, I see that there is no reservation found under your name.

USER: No issue, thank you.

ASSISTANT: You are welcome. Thank you for contacting us.