You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Susan Hernandez.

ASSISTANT: How can I help you?

USER: Can you help me to book a connecting flight from DTW to HOU?

ASSISTANT: May I know your travel dates?

USER: My travelling dates are 11 and 13 of Dec.

ASSISTANT: Do you have any preferences?

USER: I would to return in the afternoon.

ASSISTANT: Sorry, we couldn't found any flights for you.

USER: It's ok, not a problem, thank you.

ASSISTANT: Thank you for reaching us.