You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I serve you now?

USER: Can you change my reservation?

ASSISTANT: Sure, I will help you to change your reservation. May I know your good name?

USER: Thank you. Pamela Hernandez here.

ASSISTANT: Please wait for a moment, while I check for your reservation.

USER: Sure.

ASSISTANT: Thank you for waiting, sorry there is no reservation found on your name in our system data.

USER: That's ok, thank you for checking.

ASSISTANT: Thank you for visiting us.