You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I aid you at this moment?

USER: Can you please book a flight ticket from OAK to DCA?

ASSISTANT: Sure, I am here to help you. Can I know your travel dates to check the flight availability?

USER: My trip dates are 11/28 and 11/30.

ASSISTANT: Ok, please tell me your airlines preference.

USER: I prefer to travel in well known airlines for their safety.

ASSISTANT: Is there any specific timing concern?

USER: No, I can fly any time.

ASSISTANT: May I know your respective name to proceed further?

USER: I am Michelle Carter.

ASSISTANT: Ok, please give me a minute. In the meanwhile, tell me if you have any other specifications?

USER: I need a connecting flight.

ASSISTANT: There is a flight which is matching to your requirement and the ticket cost is 200 in an economy class type. Can I reserve the ticket?

USER: Yes, please proceed.

ASSISTANT: I have reserved your ticket with the flight-1017 and the airlines is Frontier Airlines.

USER: Please make sure that my airline is any normal cost airline.

ASSISTANT: Ok, there is a flight in the normal-cost airlines that is United airlines and the ticket fare is 300. Can I book the ticket with this airlines?

USER: Yes, now you can proceed for booking the ticket.

ASSISTANT: Ok, I have booked your ticket with the flight-1006. Have a nice journey.

USER: Thank you for your help.

ASSISTANT: Thank you for choosing us.