You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: Can you aid me to book my ticket from OAK to IAH?

ASSISTANT: Sure, can you please help me with your name?

USER: My travel dates are Dec 1 and Dec 3 respectively.

ASSISTANT: Sure, may I know your name?

USER: Barbara Williams here.

ASSISTANT: Do you have any class preference?

USER: No.

ASSISTANT: Flight-1004 with single connection is available in Delta airlines and the ticket price is 100 only. Flight departs at 4:00 hours and arrives at 6:00 hours. Are you comfortable with this flight?

USER: Make sure that I need a connecting flight for my travel.

ASSISTANT: Yes, this flight is with single connection.

USER: Please proceed for booking.

ASSISTANT: Your ticket is booked in economy class and have a great flight.

USER: Thank you for the help.

ASSISTANT: You are welcome and thank you for choosing us.

USER: Thank you.