You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello,. How may I assist you?

USER: I want to attend my grandmother memorial service at Houston, so I want to book a flight ticket.

ASSISTANT: May I know your travelling details?

USER: My schedule dates are from 05/29 to 05/31. My origin airport is NV-LAS and destination airport is TX-IAH. I need direct connection in between my journey.

ASSISTANT: May I know your good name please?

USER: My name is Andrew Hill.

ASSISTANT: Thanks for waiting, I am sorry to say that there is no flight on your details.

USER: No problem, thank you.

ASSISTANT: Thank you so much for connecting me. Have a nice day.