You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I serve you today?

USER: I am planning to visit Lake Merritt at Oakland, could you please help me with booking a flight ticket from ORD to OAK?

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

USER: I would like to depart on June 16th and return on June 18th.

ASSISTANT: Do you prefer a connection in between your journey?

USER: I am looking for a connecting flight.

ASSISTANT: Do you have any other preferences?

USER: I have no other preferences.

ASSISTANT: May I know your name?

USER: I am Dennis Hill.

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

USER: Ok, not an issue. Anyways, thank you for the information.

ASSISTANT: Thank you for contacting us.