Hi.
user
Hello, How can I help you today?
assistant
 I am Eric Lewis. I want to visit my parents at New York. Can you book a ticket for me?
user
Sure, can you provide your full journey details please?
assistant
My journey details are from SFO to LGA. My preferable dates are from 11/19 to 11/21.
user
Ok, please wait for a moment, I will check and let you know.
assistant
Sure.
user
Sorry to say this, there are no flights available for your journey.
assistant
Ok, thank you.
user
Thank you for approaching us.
assistant