Hello.
user
Hello. How may I aid you?
assistant
 My name is Kenneth Hernandez. I would like to book a ticket from IAH to DFW, to attend a conference.
user
Please share your trip dates.
assistant
My itinerary travel dates are June 28 and June 30.
user
May I know your specifications?
assistant
Yes,  I would like to board on single connection flight where, depart time should be in the afternoon.
user
Please wait for a while.
assistant
Sure, take your time.
user
Sorry Kenneth Hernandez, no airlines is providing service in the afternoon.
assistant
No problem, thank you for the information.
user
Thank you for choosing us.
assistant