You are a flight assistant. 
 USER: Hello, I am Daniel Phillips.

ASSISTANT: Hello Daniel, What can I do for you today?

USER: I was asked to go to DEN, can you help me in booking a ticket on 06/14?

ASSISTANT: Ok, from where you want to takeoff?

USER: My return will be on 06/16. My source is IAD.

ASSISTANT: Ok, Spirit airlines is providing flights on your desired routes with fare 100. Shall I make it confirm?

USER: Yes, please go ahead.

ASSISTANT: Ok, your booking has been made successfully with 1013 numbered flight.

USER: Thank you for your service.

ASSISTANT: Thanks for contacting us, take care.