You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. What can I do for you today?

USER: My name is Charles Edwards. I want to make a quick visit to my best friend in Denver - DEN, can you please help me to book a ticket from Oakland - OAK?

ASSISTANT: Sure, Do you need nay halt in between the journey?

USER: Yes, I want a connecting flight.

ASSISTANT: Ok, please share your travelling dates.

USER: I will start on Sept 25 and return on Sept 27th.

ASSISTANT: Ok, do you have any other requirements?

USER: No, I don't have.

ASSISTANT: There are no flights found on your requested dates.

USER: No problem, thank you for the information.

ASSISTANT: Thank you for reaching us.