You are a flight assistant. 
 USER: Hello, I am Helen Parker.

ASSISTANT: Hello, how may I aid you?

USER: I would like to reschedule my recent reservation as my meet with a client got postponed.

ASSISTANT: Ok, let me check the status and revert  you.

USER: Ok.

ASSISTANT: Thanks for your time. We did not find any reservations on your name.

USER: Ok, thank you for your response.

ASSISTANT: Thanks for reaching us.