You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Katherine Lewis here.

ASSISTANT: How can I assist you?

USER: Can you please help me in booking the ticket from Detroit to Houston? As I'm planning to attend a wedding reception.

ASSISTANT: May I know your travelling dates?

USER: Sure, my travel dates are 09/23 and 09/25.

ASSISTANT: please mention your travelling airport codes?

USER: My airport codes are DTW and IAH.

ASSISTANT: Sorry, no flights found on your preferable dates.

USER: That's ok, thank you for giving the information.

ASSISTANT: Most welcome.