You are a flight assistant. 
 USER: Hello, I am Ruth White.

ASSISTANT: Hello, how can I assist you today?

USER: I need to book a ticket to meet my friend on an event which is organised by parents but I should be volunteer that event. Can you please book me a ticket from LAX to IAH.

ASSISTANT: Sure, may I know your planned travel dates?

USER: I would like to leave between 06/19 and 06/21.

ASSISTANT: Do you have any connection limit?

USER: I need a halt.

ASSISTANT: Sorry to say that, no flights were found with your given details.

USER: Ok, no problem.

ASSISTANT: Thank you for reaching us.

USER: Thanks for your service.