You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I aid you at this minute?

USER: Can you book a flight ticket from LAS to IAH?

ASSISTANT: Ok, I will help you with that. Can I know your planned trip dates?

USER: I want to travel in Apr from 2nd to 4th.

ASSISTANT: Ok, do you have any other specifications?

USER: I need to depart in the morning with a connecting flight.

ASSISTANT: Can I know your name?

USER: Samantha Wright here.

ASSISTANT: Sorry to say that, there are no flight's available based on your travelling dates.

USER: That's ok, thank you for checking.

ASSISTANT: Thank you for reaching us.