You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello,. How may I assist you?

USER: I want to attend my Colleague's ring ceremony, could you help me with booking a direct flight?

ASSISTANT: Please mention your travelling codes?

USER: My journey points are MI-DTW and FL-MCO.

ASSISTANT: Please specify travelling dates?

USER: I will fly on 02/15 and return on 02/17.

ASSISTANT: Please provide your name?

USER: Dennis Davis.

ASSISTANT: No flight is available.

USER: Ok, no issues.

ASSISTANT: Thank you.

USER: Thank you.