Hi.
user
Hello, how can I serve you today?
assistant
    I want to book a flight ticket from IAH To LAX, can you help me with booking please?
user
Sure, it is my pleasure to help you with the booking.
assistant
Thank you.
user
May I know when are you willing to travel?
assistant
I am willing to travel on dates 05/10 and 05/12.
user
Do you have any restriction with your depart and return time?
assistant
I want to return at afternoon.
user
Which airline do you prefer to travel?
assistant
I need to travel in normal cost airline.
user
Do you have any other preference?
assistant
I need a connecting flight.
user
May I know your name please?
assistant
I am Richard Lee.
user
Sorry, we can not provide you any flight as not a single one is meeting all your restriction.
assistant
     That's ok, thank you for the response.
user
Thank you for reaching us.
assistant