Hello.
user
Hello, how may I serve you?
assistant
I am looking for a flight from LGA to IAH, can you please help me in booking?
user
Sure, I will help you. Please send your travelling dates.
assistant
My travelling dates are Aug 12 and Aug 14.
user
Do you have any preferences?
assistant
I want to return in evening.
user
May I know your name please?
assistant
My name is Jack Clark.
user
Sorry, there is no flight available with your requirements.
assistant