You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello,. How may I assist you?

USER: I want to book a ticket from IAH to LAS to meet my best friend. Please help me with it.

ASSISTANT: Sure, may I know your travelling dates?

USER: My travelling dates are from 05/06 to 05/08.

ASSISTANT: Please wait for a minute.

USER: Ok.

ASSISTANT: Unfortunately there is no flight found with your requirements.

USER: Fine, thanks for the information.

ASSISTANT: Thank you for reaching. May I know your good name?

USER: I am Ashley Lopez.