You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, How can I help you?

USER: Jessica Thompson here. Can you please book me a ticket from DFW to HOU?

ASSISTANT: Sure, May I know your travelling dates?

USER: My trip dates are Feb 15th and 17th.

ASSISTANT: Do you have any preferences?

USER: I need a single connecting flight. I prefer normal cost airlines.

ASSISTANT: Thanks for your details, please hold on.

USER: Ok, sure.

ASSISTANT: Thanks for waiting. There are no flights in the normal-cost airline.

USER: Ok, not an issue. Thank you for the information.

ASSISTANT: Thank you.