You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello, how may I assist you?

USER: I am Kevin Green. I want to book a flight ticket to Los Angeles to attend my sister's marriage. Please help me with a connecting flight.

ASSISTANT: Sure, may I know your journey dates?

USER: My travelling dates are from 06/20 to 06/22.

ASSISTANT: Kindly, mention your airport codes.

USER: I want to fly from IAH to LAX.

ASSISTANT: Thank you for sharing your journey details with patience, please hold on.

USER: Ok.

ASSISTANT: No flights found on your journey locations.

USER: Ok, no problem. Thank you.

ASSISTANT: Thank you for choosing us, have a nice day.