You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: Could you book my ticket in normal-cost airlines?

ASSISTANT: Sure, I will help you. Can you please share me your travelling dates?

USER: My itinerary dates are Jan 2 and Jan 4.

ASSISTANT: Ok, please provide me your travelling airport codes.

USER: My genesis and terminus airport codes are OAK and DCA.

ASSISTANT: Ok, please mention your name.

USER: Thomas Jones here.

ASSISTANT: Ok, do you have any other specifications?

USER: I prefer a connecting flight.

ASSISTANT: Sorry, no flights are available on your route.

USER: No problem, thank you.

ASSISTANT: Welcome, have a nice day.