You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Gary Rodriguez.

ASSISTANT: How can I help you today?

USER: I need to my reservation, can you help me out please? I need to modify my reservation.

ASSISTANT: Sure, please wait for a while.

USER: Ok.

ASSISTANT: Sorry, no reservation found by your name.

USER: That's ok, no problem. Thank you for your help.

ASSISTANT: It's my pleasure, have a great day.