You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello,. How shall I assist you?

USER: Can you help me to book a flight ticket with the name Karen Martinez to attend my niece baby shower?

ASSISTANT: Please provide your travelling dates.

USER: I will start on 02/14 and my return date will be on 02/16.

ASSISTANT: Please let me know travelling airport codes.

USER: My nearest airport is Washington DC-DCA to reach Oakland, CA-OAK.

ASSISTANT: Any specifications?

USER: The connection limit should be one.

ASSISTANT: Ok. No flight is available. Thanks.