You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, How can I aid you at this moment?

USER: Could you please make a reservation with name of Frank Lewis?

ASSISTANT: Sure, please share me your trip dates.

USER: My trip dates are Dec 17 and Dec 19.

ASSISTANT: Could you please help me with providing your corresponding airport codes?

USER: I am heading to LAS from DEN.

ASSISTANT: Do you need direct flight or connecting flight?

USER: I need a connecting flight.

ASSISTANT:  Would you let us know if you have any other preferences?

USER: I don't have any other specifications.

ASSISTANT: Thanks for being hold on, we found 1002 flight in AA airline available with your requirements. Shall I proceed with economy class?

USER: Ok, proceed with the booking.

ASSISTANT: Your booking is confirmed with connecting flight.

USER: Thank you for the help.

ASSISTANT: Thank you for opting us.