Hi.
user
Hello, how may I support you?
assistant
Can you avail me to book a flight from BOS to DEN?
user
When are you planning to travel?
assistant
My planned journey dates are Jan 10 and 12.
user
Which type of class do you prefer for your journey?
assistant
I am comfortable with any class.
user
Is there any connection limit for you?
assistant
Yes, I need a break in my journey.
user
May I know your name?
assistant
Robert Taylor here.
user
May I know if you prefer to have any other comforts in your journey?
assistant
I want to depart in the evening time.
user
 OK, please wait a moment.
assistant
Sure.
user
Sorry Robert Taylor, based on your specified requirements we haven't found any flights in airline database.
assistant
Ok, thank you.
user
Thanks for contacting us.
assistant