Hello.
user
Hello. How can I help you?
assistant
Can you aid me to book a flight ticket from IAD to DFW?
user
May I know your travelling dates?
assistant
I planned my trip on the dates May 20 and May 22.
user
Do you have any preference?
assistant
I prefer afternoon at the time of depart and morning flight for my return journey.
user
Can I know your name?
assistant
Myself Betty Evans.
user
I regret, there is no flight for your requirement.
assistant
No issue, anyway thank you for checking.
user
Thank you.
assistant