You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I help you?

USER: I am Patrick Miller. I want to book a ticket from IAH to LAS, can you help me?

ASSISTANT: Sure, can I know your travelling dates?

USER: My travel dates are 06/18 and 06/20.

ASSISTANT: Ok, please wait a moment.

USER: Sure.

ASSISTANT: We found a direct flight from Delta airline with economy class and fare is 100. Shall I proceed?

USER: I need a connecting flight.

ASSISTANT: Please wait a moment, I will check and get back to you.

USER: Ok.

ASSISTANT: Sorry. there are no flights found on given dates.

USER: No problem, thanks for your information.

ASSISTANT: Thank you for reaching us.