You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you today?

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

ASSISTANT: Sure, I am here to help you to change that reservation, please wait for a minute let me check the reservation details.

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

ASSISTANT: Sorry for this inconvenience, I could not find any reservation with your name in our database as per your request.

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

ASSISTANT: Thanks for choosing us, have a great day.

USER: Most welcome.