You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you?

USER: I need you to book a flight ticket from IAH to LAX.

ASSISTANT: Please provide your itinerary dates.

USER: March 26 and 28 are my planned travelling dates.

ASSISTANT: Which class do you prefer?

USER: I prefer to fly in a economy class.

ASSISTANT: May I know your connection limit?

USER: I need a direct flight.

ASSISTANT: Do you have any other specifications?

USER: Nothing much to state.

ASSISTANT: May I know your name?

USER: My name is Samuel Gonzalez.

ASSISTANT: Sorry Samuel Gonzalez, no flights are available on your route.

USER: That's ok. Thank you.

ASSISTANT: Thank you for choosing us.