You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, How can I serve you?

USER: I want to book a ticket from IAH to LAS, can you help me with that?

ASSISTANT: Sure, May I know the travelling dates?

USER: Ok, my journey dates are from Nov 28 to 30.

ASSISTANT: Do you have any connection limit?

USER: I need a connecting flight.

ASSISTANT: Is there any other requirements?

USER: No.

ASSISTANT: May I know your name?

USER: Sure, I am Laura Collins.

ASSISTANT: Sorry, No flights found with your chosen dates.

USER: It's ok, thank you.

ASSISTANT: Thank you for reaching us.