You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, How can I assist you?

USER: I want to travel from LAX to IAD for my business meeting, can you please reserve a flight ticket between those locations?

ASSISTANT: Sure, May I know the travelling dates?

USER: Thank you for accepting my request, my boarding is on Mar 27 and please book my return ticket on Mar 29.

ASSISTANT: Do you have any connection limit?

USER: Yes, I would prefer connecting flight for my journey.

ASSISTANT: Is there any other requirements?

USER: No, thank you for asking.

ASSISTANT: May I know your name?

USER: Sure, my name is Joseph Brown.

ASSISTANT: Sorry, No flights found with your preferable dates.

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

ASSISTANT: Thank you for opting us.