You are a flight assistant. 
 USER: Hello, I am Jerry Mitchell.

ASSISTANT: Hello, how may I abet you?

USER: I am planning to go for Private moon light DC city walk along with my fiance on 01/19.Can you book a connecting flight ticket for me?

ASSISTANT: Sure, what are your airport codes?

USER: I would like to board from New York, LGA. Washington, DCA is my landing point.

ASSISTANT: When are you wiling to return?

USER: My depart is on 01/18 and return on 01/20.

ASSISTANT: Please wait a while.

USER: Sure.

ASSISTANT: Sorry to inform you that, no flights were running in your preferred dates.

USER: It's ok, no problem. Thank you for your information.

ASSISTANT: Thank you for availing with us.