You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello.

USER: I am Kathleen Roberts.

ASSISTANT: Please mention, What kind of help you are looking to?

USER: I am planning to visit Korean war veterans memorial in Washington DC - DCA. Can you help me to book a connecting flight?

ASSISTANT: Sure, I need your travelling dates. Can you help me in that?

USER: My trip dates are 09/14 and recur on 09/16.

ASSISTANT: Can I know, from which city airport you want to start?

USER: My source is from Oakland, CA - OAK.

ASSISTANT: Sorry, there are no flights found on your travel dates, for your journey.

USER: Ok, no issues. Thank you.

ASSISTANT: Thanks for approaching us.