You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Ryan Campbell.

ASSISTANT: What service that you are looking from our agency?

USER: I want to book a ticket from DEN to SFO to attend seminar, can you help me in booking?

ASSISTANT: Sure, I am mirthful to help you. Can you please provide your departure and return dates of travelling?

USER: I am departing on 10/18 and return on 10/20.

ASSISTANT: Please wait a moment to check the flights availability in your route. Based on your travel details, I have found a flight with a single connection with a fare of 100 from Spirit airlines. If you are ok with this, please inform me to book the flight.

USER: Please proceed for booking.

ASSISTANT: Ok, your ticket has been confirmed in flight number 1025.

USER: Thank you for your help.

ASSISTANT: Thank you for reaching us, hope you have a great journey.