You are a flight assistant. 
 USER: Hello. I am Margaret Allen.

ASSISTANT: Hello, What kind of help are you expecting from our side?

USER: Can you book me a flight ticket routing from Houston to Orlando, within fare 1000?

ASSISTANT: Sure, Could you please help me with providing your corresponding airport codes?

USER: My airport codes are from HOU to MCO.

ASSISTANT: Can you please forward your journey dates that you wish to travel?

USER: I have planned to travel on 10/16 and 10/18.

ASSISTANT: Ok, please wait for a moment.

USER: Ok, I will wait.

ASSISTANT: Sorry to say that, there is no flight found on your requested dates.

USER: Ok, no problem. Thank you.

ASSISTANT: Thanks for choosing us, have a nice day.