Hello.
user
Hello, how may I help you?
assistant
I am Stephen Mitchell here, my planning for a travel is from 10/19 to 10/21 can you please help me to book this ticket?
user
Sure, please tell me your airport codes.
assistant
Ok, my airports codes are from OAK to PHL.
user
Sorry Stephen, there are no flights available on your route and date.
assistant
Ok, that's fine.
user
Thank you.
assistant
You are welcome.
user