You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you?

USER: I am Dorothy Brown, want to travel from IAH to DEN. Please help me.

ASSISTANT: Sure, I will help you.

USER: Thanks.

ASSISTANT: Let me know your name.

USER: I have already mentioned. Please check once.

ASSISTANT: May I know your travelling dates?

USER: My travel dates are from 12/06 to 12/08.

ASSISTANT: Please wait for a minute.

USER: Ok.

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

USER: That's fine, thank you.

ASSISTANT: Thanks for availing us.