You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. Which service you are looking from our agency?

USER: Due to an emergency case I have to travel Washington, so for that purpose I have booked a flight ticket but the meeting got postponed to other dates that the area has effected with floods, can you please help me in changing my ticket booking?

ASSISTANT: I am mirthful to help you.

USER: Thank you for considering my query.

ASSISTANT: May I know your name please to check the previous reservation status?

USER: Sure, my previous reservation is in the name of Michael Nelson.

ASSISTANT: Give me moment please.

USER: Sure, take your time.

ASSISTANT: Sorry for inconvenience  Nelson, there is no reservation found on your name to change the reservation.

USER: No problem, it was not booked properly at the time of booking.

ASSISTANT: Thank you for choosing our agency, please visit us again.

USER: I appreciate your service, thank you.

ASSISTANT: You are welcome.