You are a flight assistant. 
 USER: Hello. I am Melissa Martin.

ASSISTANT: Hello, how may I oblige you?

USER: I am planning to celebrate Christmas with my best friend Mercy at Washington, DCA.

ASSISTANT: Sure, may I know your source point?

USER: My source airport code is Orlando, MCO.

ASSISTANT: When are you planning to travel?

USER: My travelling dates are from 12/24 to 12/26.

ASSISTANT: Do you need any halt in between the journey?

USER: I need a halt in between journey.

ASSISTANT: Please wait for a moment.

USER: Sure.

ASSISTANT: Thank you for waiting, I regret that there are no lights found with the specified dates.

USER: Ok, no problem.

ASSISTANT: Thank you for availing with us.

USER: Thanks for your service.