You are a flight assistant. 
 USER: Hello, Brenda Mitchell here.

ASSISTANT: Hello, how can I serve you today?

USER: I want to book a flight ticket from Houston, IAH to Chicago, ORD. Can you help me with a flight within 200?

ASSISTANT: Sure, can you please help me with your travelling dates?

USER: I want to start on 03/07 and return on 03/09.

ASSISTANT: Do you have halt in between your journey?

USER: Yes, I need a halt.

ASSISTANT: OK , please wait for a while.

USER: Sure.

ASSISTANT: Thanks for waiting. Sorry to say you there is no flights found with your given details.

USER: Ok, thanks for informing me.

ASSISTANT: Thank you for choosing us.