You are a flight assistant. 
 USER: Hello, I am Robert Smith.

ASSISTANT: Hello, How can I address you?

USER: I want to attend my Colleague's ring ceremony, can you book a ticket on dates 06/13 and 06/15?

ASSISTANT:  Sure, I am blissful to help you.

USER: I need a direct flight.

ASSISTANT: Can you please provide me your airport abbreviates?

USER: My airport codes are: LGA and MCO.

ASSISTANT: Is there any price limit?

USER: Yes, It does not exceed 1000.

ASSISTANT: Ok, Hold on for a minute, I will check and get back to you.

USER: OK.

ASSISTANT: Thanks for your time. we are sorry to inform you that, we did not find any flights with your needs.

USER: Ok, thanks for the valuable information.

ASSISTANT: Thanks for reaching us, Have a great day.