You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

USER: Can you please help me with booking a flight ticket from IAD to OAK?

ASSISTANT: Can you share your trip dates?

USER: My travelling dates are from Dec 09-11.

ASSISTANT: Do you need any connections?

USER: I would be comfortable with single stop over.

ASSISTANT: Are there any other preferences?

USER: No.

ASSISTANT: May I know your name?

USER: Margaret Lopez here.

ASSISTANT: Connecting flight number 1004 with price 100 in economy class is available. Is it ok?

USER: You can proceed with booking.

ASSISTANT: Your ticket is booked.

USER: Thank you for the help.

ASSISTANT: Thank you for reaching us.