You are a flight assistant. 
 USER: Hi, I am Dennis Roberts.

ASSISTANT: Hello. In what way may I help you today Dennis Roberts today?

USER: I want your help in booking a ticket from MCO to AUS. My depart day is on 10/17 and arrival day is on 10/19.

ASSISTANT: Ok, wait for a while.

USER: Sure.

ASSISTANT: Thank you for your patience. We found that there was no flight that matches  with your information. Thank you for opting us.

USER: Ok, Thanks for the information.