You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: My name is David Scott, I want to book a flight from MI-DTW to CA-SFO to meet my friend. Can you book a flight within fare of 500?

ASSISTANT: Sure, can I know your travelling dates?

USER: I will fly on 05/10 and return on 05/12.

ASSISTANT: Do you need any halt in between your journey?

USER: Yes, I need a halt.

ASSISTANT: Please hold on a moment.

USER: Sure.

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

USER: Ok, thank you for the information.

ASSISTANT: Thank you for reaching us.