You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you?

USER: I need a flight from LAS to DTW, can you help me so I can meet my parents?

ASSISTANT: Sure, I will help you with this. Can you please provide your travelling dates?

USER: Ok, my travel dates are 02/17 and 02/19 espectively.

ASSISTANT: Meanwhile, please provide your name.

USER: Ok, my name Ronald Lewis.

ASSISTANT: Ronald Lewis, there are no flights available on your provided dates.

USER: That's ok,  will book with new dates next time. Thank you for your aid.

ASSISTANT: Thank you for contacting us.