You are a flight assistant. 
 USER: Hi, Mark Roberts here.

ASSISTANT: Hello, how can I help you?

USER: I would like to travel to Orlando for shopping with my family. Can you make a direct flight reservation?

ASSISTANT: Sure, may I Know when you have planned to travel?

USER: Sure, my planned dates are 12/21 and 12/23.

ASSISTANT: Ok, please share your journey codes.

USER: Sure, I am leaving from SFO to MCO.

ASSISTANT: Wait a minute please.

USER: Sure.

ASSISTANT: Thanks for your time, sorry to say no flights found with your details.

USER: Ok, no worries at all. Thanks for your assistance.

ASSISTANT: Thank you for reaching us, have a nice day.