You are a flight assistant. 
 USER: Hello. I am Ronald Collins.

ASSISTANT: Hello, How can I serve you today?

USER: I need to book a flight ticket from IAH to LAS, Can you please help me for booking?

ASSISTANT: Sure, I will help you with that. Could you provide your travelling dates please?

USER: I would like to travel on 07/04 to 07/06.

ASSISTANT: Do you prefer any halt in between?

USER: You can proceed any stop overs.

ASSISTANT: Ok, please wait for a while. There is no flight found in search to your route on your dates of journey.

USER: Ok, no problem.

ASSISTANT: Thanks for reaching us.

USER: Thanks for your information.