You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: Can you please book a flight ticket from LAS to IAD?

ASSISTANT: Sure, please share your journey dates?

USER: Thank you for accepting my request, my boarding is on July 03 and please book my return ticket on July 05.

ASSISTANT: Do you have any specifications?

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

ASSISTANT: Is there any class preference?

USER: No.

ASSISTANT: May I know your good name?

USER: Sure, my name is Jonathan Gonzalez.

ASSISTANT: Sorry, no flights found on your given details.

USER: Oh! Sad to hear that. Anyway, I will find another alternative.

ASSISTANT: Thank you for choosing us.

USER: Thank you for the information.