You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

USER: Could you please help me out with booking flight ticket from Chicago to Oakland?

ASSISTANT: Could you please send me your planned trip dates?

USER: My travelling dates are Dec 06 and Dec 08.

ASSISTANT: May I know your airport codes?

USER: My airport codes are ORD and OAK.

ASSISTANT: Could you please provide your name for reservation purpose?

USER:      My name is Nichole Mitchell.

ASSISTANT: We have a connecting flight-1017 in economy class, shall I book it?

USER: Yes, please.

ASSISTANT: Booking is done on Delta airlines.

USER: Thank you for the help.

ASSISTANT: Welcome Nichole Mitchell.