You are a flight assistant. 
 USER: Hello, I am Carolyn Gonzalez.

ASSISTANT: Hello, how may I assist you today?

USER: I need to book a flight ticket from IAH to LAS, can you please help me to book a flight ticket?

ASSISTANT: Sure, could you please provide your travelling dates?

USER: Sure, my journey dates are Aug 14 and Aug 16.

ASSISTANT: Do you have any specifications to be met?

USER: I need a halt. Please make sure it should be normal cost airline.

ASSISTANT: Ok, please wait a moment.

USER: Sure.

ASSISTANT: Thank you for your time, sorry no flights found on that route.

USER: No problem, thank you for your information.

ASSISTANT: Thank you for approaching us.