You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Patrick Walker.

ASSISTANT: Patrick Walker, how can I aid you today?

USER: I have to attend a Live Concert at Seattle, could you please help me with booking a flight ticket from IAH to SEA?

ASSISTANT: Sure, I am here to help you. May I know your travel dates please?

USER: I would like to depart on Apr 14th and return on Apr 16th.

ASSISTANT: Ok, do you have any other requirements?

USER: I need a connecting flight in business class.

ASSISTANT: Ok, hold on for a moment. Let me check the best flight for you.

USER: Make sure that my return time must be evening.

ASSISTANT: Sorry Patrick Walker, there are no flights available on your requested dates.

USER: Ok, not an issue. Anyways, thank you for the information.

ASSISTANT: Welcome, thank you for choosing us. Have a great day.