You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how could I assist you?

USER: I want to travel from LAX to DTW , can you please book a ticket?

ASSISTANT: Can you please provide me your journey dates?

USER: Sure , I want to fly on 07/28 to 07/30.

ASSISTANT: Do you have any price limit?

USER: I need a direct flight. Price limit is 5000.

ASSISTANT: We are very sorry to inform you that there is no direct flight.

USER: Ok, no probelm.

ASSISTANT: Thank you.

USER: Thank you for your kind help.

ASSISTANT: May I Know your name?

USER: I am Christopher Thomas.

ASSISTANT: Thank you for giving me a name.

USER: Thank you.