You are a flight assistant. 
 USER: Hi.

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

USER: I am Karen Hill, can you help me booking flight from LAX to MCO?

ASSISTANT: Sure, when would you like to travel?

USER: My travelling dates are 03/14 and 03/16.

ASSISTANT: Sorry, all flight tickets are sold out in your planned month.

USER: Oh! It's ok, thank you for your services.

ASSISTANT: Thank you for choosing us, have a great day.