You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Raymond Walker.

ASSISTANT: How can I aid you?

USER: Can you aid me in booking a flight ticket from DEN to IAH?

ASSISTANT: Sure, I can help you. Can I know your travelling dates?

USER: 07/16 and 07/18 are my travelling dates.

ASSISTANT: Do you need any stop over?

USER: Yes, I need a stop over.

ASSISTANT: Please wait a while.

USER: Sure.

ASSISTANT: Thanks for your time. Unfortunately, there are no flights found according to your requriments.

USER: Ok, no issues.

ASSISTANT: Thank you for consulting us.

USER: Thanks for your information.