You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I assist you today?

USER: I want to book a ticket from IAH to ORD, can you help me?

ASSISTANT: Sure, I will help you. Please help me with your name.

USER: I am John Green.

ASSISTANT: Please help me with your planned travelling dates.

USER: My travel dates are Nov 09 and 11.

ASSISTANT: Do you need a break in between your journey?

USER: I prefer a break in my journey.

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

USER: I want to return in the morning.

ASSISTANT: John Green, I am really sorry to inform you that there are no flights available for your journey that returns in the morning.

USER: No problem, thanks for checking.

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