You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: I want to book a ticket from IAH to LAX.

ASSISTANT: Sure, may I know your travelling dates?

USER: I am travelling from Feb, 1 to Feb, 3.

ASSISTANT: Do you have any requirements?

USER: I need a direct flight.

ASSISTANT: Sorry to say, there is no flight available for you. May I know your name?

USER: My name is Donna Evans.

ASSISTANT: Thank you for reaching us.

USER: Thanks for the help.