You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: Will you please book me a flight ticket from MCO to LAS?

ASSISTANT: Sure, please share your journey dates?

USER: I will start on Sept 29th and return on Oct 1st.

ASSISTANT: Do you have any specifications?

USER: Yes, I need lay by in between and my depart time must be in the evening and it should be a normal cost airline.

ASSISTANT: Is there any class preference?

USER: No.

ASSISTANT: May I know your good name?

USER: I am Angela Johnson.

ASSISTANT: Sorry, no flights found with your required dates to travel.

USER: That's alright, thanks for your assistance.

ASSISTANT: Thank you for opting us.