You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: My name is William Miller.

ASSISTANT: How may I help you? Sure, please help me with your travel date.

USER: I would like to travel from MCO to DTW, could you help me out? My preferable dates are from 10/01 to 10/03.

ASSISTANT: Sorry, no flights available.

USER: That's ok.

ASSISTANT: Thank you for reaching us.

USER: Thank you for your time.