You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: My name is Ashley Martinez.

ASSISTANT: How can I help you at this moment?

USER: Can you please check whether there are any flights available from IAH to DFW?

ASSISTANT: Ok, I will help you, may I know your journey dates?

USER: Sure, my travelling dates will be 09/14 and 09/16.

ASSISTANT: Sorry, there are no flights available at those location.

USER: That's ok, thank you.

ASSISTANT: Thank you for choosing our agency.