Hello.
user
How may I assist you today?
assistant
I want to book a flight from Houston to visit Belle IsIe Aquarium with my friend. Can you help me to book a direct flight?
user
Sure, do you need direct flight or connecting flight?
assistant
I need a direct flight.
user
Can you please share your airport codes?
assistant
My source point is IAH and my destination is DTW.
user
On which dates would you like me to book  a flight ticket?
assistant
I will travel on Dec 1st and return on Dec 3rd.
user
May I know your good name?
assistant
May name is Anna Mitchell.
user
Do you have any other preferences?
assistant
I want my return flight in evening.
user
Thanks for your details, there is no flight found on your journey dates.
assistant
Ok, thank you for the information.
user
Thank you for availing us.
assistant