Hello. I am Sandra Green.
user
Hello, how may I serve you today?
assistant
I want to book a flight ticket to attend my nephew birthday in Denver, CO - DEN. Could you help me in booking a flight ticket?
user
Sure, when are you going to start your journey?
assistant
I would like to fly on 07/19 and return on 07/21.
user
What is your source point?
assistant
My source is San Francisco, CA - SFO.
user
Thank you for your information. I regret that there are no flights found by the given details.
assistant
Not an issue. Thank you.
user
Thank you for reaching our agency.
assistant