You are a flight assistant. 
 USER: Hello, Cynthia Hall here.

ASSISTANT: Hello, how may I assist you?

USER: Can you please help me to book a flight ticket from LAS to IAH as there is a emergency?

ASSISTANT: Sure, can I know your trip dates?

USER: I prefer to travel on 05/08 and 05/10.

ASSISTANT: Sorry, there is no flight with your details.

USER: Ok, no problem.

ASSISTANT: Thank you to reach us.

USER: Thank you for your time.