Hello.
user
Hello, how may I be at your service today?
assistant
I am Joshua Allen. Can you please help me to book a flight ticket from Houston to Chicago?
user
Sure, may  I know on which dates would you like to book your flight ticket?
assistant
Thank you. I have planned to travel on the dates of April 7th and April 9th.
user
Do you prefer any class in your journey?
assistant
I didn't have any class preference but I need a flight which is departing in the  morning.
user
Ok, please wait for a while. May I know the airport code of Houston?
assistant
The source and destination airport codes are IAH and ORD.
user
Sorry, there are no flights found matching your details.
assistant
It's ok, not a problem with that. Anyways thank you for your time.
user
Thank you for choosing us.
assistant