You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you today?

USER: I have a live concert at San Francisco, please book a ticket from MCO to SFO.

ASSISTANT: Sure, please provide me your trip dates.

USER: My journey dates are 07/25 and 07/27.

ASSISTANT: Ok, please wait for a moment.

USER: Sure, take your time.

ASSISTANT: May I know your name?

USER: My name is Melissa Rodriguez.

ASSISTANT: Sorry Melissa, there are no flights available on your preferred dates.

USER: Ok, no problem. Thank you for your information.

ASSISTANT: You are welcome and have a nice day.