You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Anthony Davis.

ASSISTANT: Davis, how may I help you?

USER: I am looking for a flight from OAK to DCA, can you book the flight ticket for me?

ASSISTANT: Sure, please provide your itinerary dates.

USER: My travelling dates are from 12/26 till 12/28.

ASSISTANT: Please hold on for a while. UA airlines with flight 1004 is available.

USER: Ensure that connection limit should be one.

ASSISTANT: It's a connecting flight.

USER: I can afford the flight ticket only 1000.

ASSISTANT: Ticket costs you only 100.

USER: Please proceed with it.

ASSISTANT: Your ticket is reserved.

USER: Thank you for your help.

ASSISTANT: Thank you for reaching us.