You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I assist you?

USER: Could you please avail me a flight ticket from Denver, DEN to Oakland, OAK?

ASSISTANT: Sure, may I know your preferred travel dates?

USER: My trip dates are 07/07 - 07/09.

ASSISTANT: Do you have any specifications?

USER: I need a single connecting flight.

ASSISTANT: May I know your name?

USER: Samuel King here.

ASSISTANT: Ok, please wait a minute.

USER: Sure.

ASSISTANT: Sorry, there were no flights found on your route.

USER: No issues, thank you.

ASSISTANT: Thank you for reaching us.