You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Shirley Clark.

ASSISTANT: Shirley Clark, how can I render you today?

USER: I want to book a ticket from IAD to LGA to attend seminar, can you help me in booking?

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

USER: I am departing on Dec 05 and return on Dec 07.

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

USER: I preferred to travel in business class.

ASSISTANT: I found a flight for you in business class, shall I proceed to reserve a seat in this single connecting flight?

USER: I like to depart in morning.

ASSISTANT: Sorry Shirley Clark, there are no flights available in the morning.

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

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