You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you today?

USER: I am Nancy Martin, planning to meet my parents. Can you please book a flight ticket from ORD on 01/23?

ASSISTANT: Sure, can you provide me your destination code and return date?

USER: Sure, my return journey details are from HOU on 01/25.

ASSISTANT: Thank you for your details. Please hang on a moment I will check and revert to you.

USER: Ok.

ASSISTANT: Sorry to inform you, there are no flights matching your request.

USER: It's ok, thank you for your quick response.

ASSISTANT: Thank you for choosing us. Have a nice day.