Hi. I am William Clark.
user
Hello, How can I serve you?
assistant
I need to book a ticket from LGA to SFO to meet my  Uncle in his home. Could you please help me in doing that?
user
Surely, I will help you. May I know the journey dates?
assistant
My travelling dates are 02/12 and return on 02/14.
user
Sorry, No flights found with your preferable dates. Thank you for opting us.
assistant
Thank you for your valuable information.
user