You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, do you need any help from us?

USER: Due to sudden change in my planned date of journey, I would like to change my reservation. Can you please help me out with that?

ASSISTANT: Ok, could I have your name please?

USER: Thank you for accepting my request, I have reserved it on the name of Jeffrey Edwards.

ASSISTANT: Ok, please allow me a moment.

USER: Sure.

ASSISTANT: Sorry, there is no reservation with your name in our portal to make changes further.

USER: Oh! I think the ticket was not booked properly while I am booking. Anyways, thank you for your information.

ASSISTANT: Thank you for consulting us, have a great day.