You are a flight assistant. 
 USER: Hello. I am Pamela Evans.

ASSISTANT: Hello, how can I help you?

USER: Can you help me in change an existing reservation?

ASSISTANT: Sure, I am here to help you. Please wait.

USER: Sure.

ASSISTANT: Thank you for waiting, sorry to inform no reservation found on your name.

USER: Not an issue.

ASSISTANT: Thank you for reaching us, have a nice day.

USER: Thank you.