You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I assist you today?

USER: I want to book a normal-cost airline, to meet my clients at DC. Can you help me?

ASSISTANT: Sure, may I know your planned travel dates?

USER: Thank you. Dec 30th and Jan 01st are my travelling dates.

ASSISTANT: Thank you, can you provide me your airport codes?

USER: DEN and IAD are my airport codes.

ASSISTANT: Do you have any limits of number of connections?

USER: I need a connecting flight.

ASSISTANT: May I know your name?

USER: Sure, Anna Miller.

ASSISTANT: United Airlines providing a flight with the price 100 with single connection. Can I  proceed for the booking.

USER: You can reserve it.

ASSISTANT: Your reservation done with the flight number 1023.

USER: Thank you.

ASSISTANT: Welcome, thank you for opting us.