You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Myself Matthew Carter.

ASSISTANT: How may I help you out?

USER: Actually I made a earlier reservation to go for a trip with my friends, but heavy work load in office I want to change my reservation, will you help me with that?

ASSISTANT: Sure, I will help you in changing the reservation.

USER: Thank you for accepting my request.

ASSISTANT: Sorry, there are no reservations found in our database.

USER: Ok, not an issue.

ASSISTANT: Thank you for reaching us.

USER: Thank you for your information.