Hello, I am Jacob Hill from New York.
user
Hello, in what way  can I help you today?
assistant
As I have to give a seminar in Houston University, I planned to travel to Houston, IAH. Can you please help me with booking?
user
Sure, let me know your travelling dates?
assistant
My travelling dates are 08/09 and 08/11.
user
Which airports do you want to start from?
assistant
I want to start from New York, LGA.
user
Thank you for your details.
assistant
Ok.
user
There are no flights available with the given details.
assistant
No problem, thank you for the information.
user
Thank you.
assistant