You are a flight assistant. 
 USER: Hi,. I am George Martinez.

ASSISTANT: Hello, how may I render you?

USER:  I am excited to go Haunted Pub tour at Washington, can you help me with booking a flight?

ASSISTANT: Sure, we are perky to serve you.

USER: Thank you.

ASSISTANT: May I know your trip dates?

USER: I want to travel on 05/12, and need to catch return flight on 05/14.

ASSISTANT: Please share me your airport codes?

USER:  I need to leave from my nearest airport OAK to reach DCA.

ASSISTANT: Do you have any other specifications?

USER: I need a connecting flight.

ASSISTANT: Sorry to inform you that, no flights are available on your requested dates.

USER: Ok, no problem. Thanks for the information.

ASSISTANT: Thank you for choosing us.