You are a flight assistant. 
 USER: Hello. Patrick Roberts here.

ASSISTANT: Hello, how may I aid you?

USER: Can you make my reservation from HOU to ORD?

ASSISTANT: Sure, can you share your travel dates please?

USER: My travelling dates are from 06/23 to 06/25.

ASSISTANT: I am sorry with your given flight details, I could not find any flight in my search.

USER: It's ok. Thank you for your time.

ASSISTANT: Thanks for reaching to us.