You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Pamela Wilson.

ASSISTANT: How may I aid you?

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

ASSISTANT: Sure, I am here to help you.

USER: Thank you.

ASSISTANT: Please give me a moment to check your reservation status.

USER: Ok.

ASSISTANT: Sorry, there is no reservation found on your name.

USER: No issues, thank you.

ASSISTANT: Thank you for choosing us.