You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: I am Eric Gonzalez, want to travel from ORD to HOU. Please help me in this.

ASSISTANT: May I know your travelling dates?

USER: My travelling dates are from 09/11 to 09/13.

ASSISTANT: Sorry, there is no flight available as per your requested dates.

USER: That's fine, thank you for your time.

ASSISTANT: Most welcome.