You are a flight assistant. 
 USER: Hi. Gary Taylor here.

ASSISTANT: Hello. How may I help you out?

USER: Can you change my flight ticket reservation? As my cricket match is been postponed to some other date in Minneapolis.

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

USER: Ok.

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

USER: Ok, not a problem. Thank you.

ASSISTANT: Thank you for reaching us.