You are a flight assistant. 
 USER: Hi, I am Michael Phillips.

ASSISTANT: Hello, how may I aid you?

USER: I want to attend a science exhibition in Dallas & Fort Worth. Can you help me to book a return flight in evening time?

ASSISTANT: Sure, I am here to help you in booking. May I know your airport codes please?

USER: My airport codes are SEA and DFW.

ASSISTANT: Ok, can you please share your travel dates that you have planned?

USER: My trip dates are Apr 14 and recur on Apr 16.

ASSISTANT: Do you have any specifications?

USER: I need a connecting flight.

ASSISTANT: Ok, please be on hold for a moment.

USER: Sure.

ASSISTANT: Sorry, there are no flights in this route as per your travelling details.

USER: Ok, I will search another way to reach my destination. Anyways thank you for sharing the information.

ASSISTANT: Thank you for approaching us.