You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I aid you?

USER: I am Brian Wilson. I am looking for a flight from DEN to IAD, can you help me out please?

ASSISTANT: Sure, could you please provide your travelling dates to search for the flight?

USER: My trip dates are from 05/18 till 05/20.

ASSISTANT: Ok, please hold on for a moment I will check for the available flights.

USER: Sure, take your own time.

ASSISTANT: Ok, there is a flight 1020 in Frontier airline matching your details with price 100. Shall I proceed?

USER: Please proceed with it.

ASSISTANT: Ok, your booking is done.

USER: Thank you for your help.

ASSISTANT: You are welcome, have a safe journey.