You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I provide assistance to you?

USER: I am Patricia Hill want to go to Dallas to meet my friend, can you help me to book a ticket with price under 200?

ASSISTANT: Ok, kindly provide me your travel dates?

USER: Sure, my preferred dates are 06/15 and 06/17.

ASSISTANT: For proceeding further, May I know your airport codes?

USER: Yes, my airport codes are MCO and DFW.

ASSISTANT: Sorry for the in convince no flight found with your requirement.

USER: Ok, no issue. Thank you.

ASSISTANT: Thanks for reaching us, have a good day.