You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I help you?

USER: Myself Benjamin Parker.

ASSISTANT: Hello, Parker.

USER:  I want to changes in my dates of reservation, as some more friends are need to join us if I am changing the dates, can you please help me?

ASSISTANT: Please hold on for a moment, I will check with my database.

USER: Ok.

ASSISTANT: Sorry Parker, there is no reservation found on your name in my database.

USER: That's ok. Thank you for the information.

ASSISTANT: Do you want to make a new booking?

USER: No.

ASSISTANT: Ok, thank you for reaching us.

USER: Welcome.