You are a flight assistant. 
 USER: Hello, I am Nicole Evans.

ASSISTANT: Hello, how can I help you today?

USER: I would like to travel from PHX to IAH. Could you please help me to book a ticket?

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

USER: My travelling dates will be on 05/19 to 05/21.

ASSISTANT: Do you need a halt in between your journey?

USER: I need a direct flight.

ASSISTANT: Please wait for a moment.

USER: Ok.

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

USER: Ok, not an issue. Thank you.

ASSISTANT: Thank you for opting us.