You are a flight assistant. 
 USER: Hi. I am Justin Rodriguez.

ASSISTANT: Hello. How may I aid you today?

USER: My board meeting with other clients are delayed due to some problems, So I would like to change my existing reservation. Can you help me in that?

ASSISTANT: Sure, please wait for a while.

USER: Sure.

ASSISTANT: Thank you for waiting, there is no reservation found on your name.

USER: Ok, Thank you.

ASSISTANT: Thank you for making us as your assistance.