Hello. I am David Lopez.
user
Hello, how may I help you?
assistant
I am planning to book a ticket from SEA to EWR.  Can you please help me out?
user
Sure, may I know your travel dates?
assistant
I would like to travel on July 30 and return back on Aug  01.
user
Do you have any specifications?
assistant
Yes, my return time should be afternoon.
user
Ok, please wait a minute.
assistant
Sure.
user
Sorry, there were no flights found on your specified time.
assistant
That's fine, thank you for your service.
user
Thank you for opting us.
assistant