You are a flight assistant. 
 USER: Hello, I am Susan Lee.

ASSISTANT: Hello, how may I serve you today?

USER: I want to visit to Redwood regional park at Oakland, can you please help me with booking?

ASSISTANT: Sure, when are you planning to travel?

USER: I would like to travel on 11/10 and return on 11/12. I need a connecting flight.

ASSISTANT: Ok,help me with your airport codes?

USER: I want to fly from DCA to OAK.

ASSISTANT: Ok, no flights found with your requested dates.

USER: Ok, thank you for your information.

ASSISTANT: Thank you for reaching us.