You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: Lisa Robinson here.

ASSISTANT: How can I guide you Lisa?

USER: I would like to book a flight ticket to Houston.Can you assist me to book from Orlando, FL - MCO?

ASSISTANT: Sure, can you please provide your destination airport code?

USER: Sure, my destination code is TX - HOU.

ASSISTANT: Ok, may I know your planned dates that you like to move?

USER: Sure, I would like to move HOU on 03/26.

ASSISTANT: Ok, do you want to book a return ticket?

USER: I want to return back to my source on 03/28.

ASSISTANT: Please wait for a moment, let me check for the available airlines and revert you.

USER: Ok, sure take your time.But, please make sure that flight should have 1 connected flight.

ASSISTANT: Thank you for waiting.

USER: Ok, do you find any flight for me?

ASSISTANT: There is no flight available on your requested dates for this route, as most of  the tickets have booked so long back.

USER: Ok fine I will go with another alternative resources to reach my destination.

ASSISTANT: Sorry for the inconvenience.

USER: Not a problem.Thank you for the information.

ASSISTANT: Thank you for connecting with our service. Have a nice day.