You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I serve you the best today?

USER: I need to change an existing reservation, can you please help me?

ASSISTANT: Sure, we are here to help you.

USER: Thank you.

ASSISTANT: Can you share me your good name please?

USER: Sure, I am Christine Rodriguez here.

ASSISTANT: Please stand by.

USER: Sure.

ASSISTANT: Thanks for your time, there is no seat reserved for you in any flight.

USER: Ok, not an issue. Thank you for your help.

ASSISTANT: Thank you for reaching us.