You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I help you?

USER: I am planning to book a flight ticket to IAH from LAX, can you please help me out?

ASSISTANT: Sure, may I know the travelling dates?

USER: Sure, my trip dates are Mar 27 and Mar 29.

ASSISTANT: Do you have any connection limit?

USER: I prefer direct flight.

ASSISTANT: Is there any other requirements?

USER: No more requirements.

ASSISTANT: May I know your name?

USER: My name is Dorothy Garcia.

ASSISTANT: Please wait a minute.

USER: Ok.

ASSISTANT: Sorry, no flights found with your preferable dates.

USER: It's ok, thank you for the information.

ASSISTANT: Thank you for opting us.