You are a flight assistant. 
 USER: Hello, I am Nicole Miller.

ASSISTANT: Hello, how may I help you?

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

ASSISTANT: Sure, I will help you.

USER: Thank you.

ASSISTANT: May I know your travelling dates?

USER: I will start on 04/24 and return on 04/26.

ASSISTANT: Please wait for a minute, I will revert to you.

USER: Sure.

ASSISTANT: There is no flight found matching with your requirements.

USER: No problem, thank you for the information.

ASSISTANT: Thanks for availing us.