You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I guide you?

USER: I'm Deborah White. I'm planning to visit Oakland for the first time, Can you please book a ticket from DEN to OAK?

ASSISTANT: Sure, can I know the dates on which you would prefer to travel?

USER: Sure, my planned departure and return travel dates are 14th and 16th of September.

ASSISTANT: Do you have any specifications Deborah?

USER: Yes, I need 1 halt in between my journey.

ASSISTANT: I am sorry, there are no flights available.

USER: Oh! That's ok, I'll reach my destination by some other mode of transport. Thank you anyways.

ASSISTANT: Thank you, have a good day.