You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: David Carter here.

ASSISTANT: David, how may I aid you?

USER: Please book a ticket from DCA to PHL.

ASSISTANT: May I know your itinerary dates?

USER: My trip dates are from 11/21 and 11/23. I am looking for a single connection.

ASSISTANT: Please give me a moment to check for available flights.

USER: Sure.

ASSISTANT: Spirit airlines with flight 1008 is available for you.

USER: Please proceed.

ASSISTANT: Your ticket is confirmed.

USER: Thanks for your help.

ASSISTANT: Thank you for reaching us.