You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

USER: I am Barbara Moore. Could you please help me in flight ticket booking process from LAS to IAD?

ASSISTANT: Sure, I am glad to help you. Could you please share your travel dates?

USER: Thank you for your response, I want to take off on July 12 and book my return ticket also on July 14.

ASSISTANT: Do you require any stopovers in your journey?

USER: Yes, I need 1 stop over in my journey.

ASSISTANT: Do you have any other specifications?

USER: No.

ASSISTANT: Sorry, there are no flights found on your travelling dates.

USER: Oh! It's ok no problem. Thank you for your information.

ASSISTANT: Thank you for reaching us.