You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, do you need any help from us?

USER: Samuel Martin here. Please help me out in booking the ticket from DTW to MCO.

ASSISTANT: Sure, could you please share your departure and arrival day?

USER: Sure, my trip dates will be 06/12 and 06/14.

ASSISTANT: Sorry, all flight tickets are sold out on your requested travelling dates.

USER: That's ok, thank you.

ASSISTANT: You are welcome.