You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER:  My name is Catherine Lewis. I would like to book a ticket from CLT to OAK, to attend a conference.

ASSISTANT: Sure, can you share your journey dates?

USER: My journey dates are as follows Jan 18 to Jan 20.

ASSISTANT: Do you have any preferences?

USER: Yes, I would like to travel by a single connection flight and the depart time should be in the afternoon.

ASSISTANT: Do you prefer a connecting flight? Ok, give me a minute.

USER: Sure.

ASSISTANT: Sorry, there is no flight on your given dates.

USER: No problem, Thank you for the information.

ASSISTANT: Thank you for reaching us.