Hello.
user
Hello. How may I help you?
assistant
Can you please book a flight ticket from DTW to DFW?
user
Sure. May I know your name please?
assistant
Sure, myself Shirley Allen.
user
Now share your travel dates please?
assistant
Thank you. I have planned my travel dates as Apr 21 and Apr 23.
user
Do you have a class preference?
assistant
I would prefer economy class.
user
Are there any other specification?
assistant
I am looking for single connecting flight so please make sure that.
user
Ok, please wait.
assistant
Sure, take your time.
user
Thanks for your time.
assistant
It's ok.
user
Sorry to say that presently there are no flights available.
assistant
Oh! It is sad to hear. Anyway, thank you for your time.
user
Thank you.
assistant
Most  welcome.
user