You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Melissa Robinson here.

ASSISTANT: In which way I can aid you at this moment?

USER: Actually, I am planning for a round trip for my journey because of some emergency. So can you please reserve a flight ticket from Orlando to Boston?

ASSISTANT: Sure, I am happy to help you in booking flight ticket.

USER: Thank you for considering my request.

ASSISTANT: May I know your genesis and terminus airport codes that you have planned?

USER: Sure, I will prefer MCO and BOS as my origin and destination airports respectively because those airports are near and convenient for me to travel.

ASSISTANT: May I know your airborne and recur travel dates that you have planned to move?

USER: Ok, I want to take off on 08/26 and please book my return ticket also on 08/28.

ASSISTANT: Thank you for providing your travel details. I will put the conversation on hold to check the best flights available in your route.

USER: It's alright, take your time.

ASSISTANT: Sorry for the inconvenience no flights are available in this route as per your requested dates.

USER: Oh! Sad to hear that. Anyway, I will find another alternative to go there. Thank you for the information.

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