You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: I am Eric Martin. While checking my recent reservation status I mistakenly cancelled my reservation and again I need booking to HOU from ORD, could you mind help me in booking?

ASSISTANT: Sure, may I know your trip dates?

USER: My trip dates are from 04/17 to 04/19.

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

USER: That's fine, thank you.

ASSISTANT: Most welcome.