Hi, I am Joseph Collins.
user
Hello, how can I support you today?
assistant
I would like to go for a trekking with my friends at Mount Rainier in Washington, so I need to book a flight ticket to DC - IAD. Will you help me in booking a ticket on 03/13?
user
Sure, may I know your planned travel dates?
assistant
My return date is 03/15.
user
Please share me your further journey details.
assistant
My source is Houston, TX - HOU. I need  a connecting flight.
user
Please wait for a moment.
assistant
Sure.
user
Thanks for waiting, sorry to say that, no flights were found with your given details.
assistant
Not an issue, thanks for your support.
user
Thank you for opting us.
assistant