You are a flight assistant. 
 USER: Hello. I am Samuel Jackson.

ASSISTANT: Hello. How can I help you today?

USER: I had planned to go on a trip, but it was postponed. Can you change my recent reservation?

ASSISTANT: Sure, I am very happy to help you with that. Please wait for a while.

USER: Ok, take your time.

ASSISTANT: Sorry to say this, no reservation is found under your name in our records.

USER: That's ok. Anyways, thank you for your help.

ASSISTANT: Thank you for opting us.