You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you?

USER: I am Emma Thompson. I need to change my reservation due to my planned event got postponed. So please help me with that.

ASSISTANT: Ok, please wait a moment while I check.

USER: Thank you. I will wait for your response.

ASSISTANT: Thank you for waiting, sorry as per your need there is no reservation been found.

USER: Oh! it may not be booked properly due to server issues. Anyway, thank you for your time.

ASSISTANT: Thank you for choosing our agency.