You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I help you?

USER: I would like to book a ticket to Las Vegas to visit Red Rock canyon national conservation area, can you please help me in booking?

ASSISTANT: Sure, we are here to help you.

USER: Thank you.

ASSISTANT: Please, share your source and destination airport code.

USER: My source is at DC-DCA and destination is at NV-LAS.

ASSISTANT: Kindly, mention your price limit.

USER: I can spend upto 200.

ASSISTANT: Would you prefer either business class or economy class?

USER: Usually I do prefer business class ticket.

ASSISTANT: Can I have your depart and arrival dates?

USER: I would like to depart on 04/05 and arrival on 04/07.

ASSISTANT: Thank you for sharing your journey details. Please, hold on.

USER: Ok.

ASSISTANT: May I know your good name?

USER: I am Andrew Carter.

ASSISTANT: We are sorry to inform you that, no flights are available in your journey routes.

USER: Ok, no problem. Thank you.

ASSISTANT: Thank you for reaching us, have a good day.