You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Myself Justin Williams.

ASSISTANT: Justin, how may I render you?

USER: I am looking for a connecting flight from DCA to DEN, can you help me?

ASSISTANT: Sure, please provide your itinerary dates.

USER: Sure, my journey dates are from 12/24 to 12/26.

ASSISTANT: Please give me a moment.

USER: Ok, carry on.

ASSISTANT: Frontier airlines with flight 1005 is providing service with a connecting flight and ticket costs you 200.

USER: That's fine, please proceed for booking.

ASSISTANT: Your ticket is reserved.

USER: Thank you for your help.

ASSISTANT: Thank you for choosing us.