You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you today?

USER: Can you please book me a ticket in a flight that returns in the evening time?

ASSISTANT: Sure, I will help you. Please help me with your planned travelling dates.

USER: I will start on Jan 30 and return on Feb 1st.

ASSISTANT: Please help me with your source and arrival airport codes.

USER: My origin is HOU and destination is BOS.

ASSISTANT: Do you have any other preferences in your journey?

USER: Yes, I need 1 lay by.

ASSISTANT: Please help me with your name.

USER: I am Nicholas Anderson.

ASSISTANT: Please allow me a minute.

USER: Sure.

ASSISTANT: Nicholas Anderson, I am really sorry to inform you that there are no flights available for your journey.

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

ASSISTANT: Thank you for reaching us. Have a great time.