You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I be your helping hand today?

USER: I am Samantha Nelson. Can you please help me in changing my existing reservation?

ASSISTANT: Sure, we are happy to help you.

USER: Thank you.

ASSISTANT: Please wait for a couple of minutes.

USER: Sure.

ASSISTANT: Sorry Samantha Nelson, No active reservation was found on your name in the database.

USER: Not a problem, thank you.

ASSISTANT: Thank you for connecting with us.