You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I aid you today?

USER: I am Elizabeth Anderson. Due to an emergency work, my business meeting has been postponed.I would like to change my existing reservation. Could you please help me?

ASSISTANT: Sure, please wait for a couple of minutes.

USER: Sure.

ASSISTANT: Thanks for being patient, there was no reservation found on your name.

USER: Ok, no worries at all. Thank you for your information.

ASSISTANT: Thank you for opting our agency.