You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I aid you?

USER: I am Mark Lewis here, I would like to visit Denver, can you please help me to book a ticket from SFO to DEN?

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

USER: Ok, my dates of journey is from 10/13 to 10/15.

ASSISTANT: Ok, please wait for a moment.

USER: Sure, take your time.

ASSISTANT: Ok, there is a flight 1025 in Frontier airline matching your details with price 100. Shall I proceed?

USER: Ok, please proceed with this ticket booking.

ASSISTANT: Ok, your booking is done.

USER: Thank you for your help.

ASSISTANT: Thank you for reaching us, have a nice day.