You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I help you?

USER: I am planning for a trip from DTW to HOU, can you help me over that?

ASSISTANT: Can you please help me with your travel dates?

USER: Ok, my planned dates should be Apr 16 to 18.

ASSISTANT: Ok, may I know your name?

USER: Sure, I am Dorothy Rodriguez.

ASSISTANT: Do you have any class preference?

USER: No, I need a connecting flight.

ASSISTANT: Do you have any other preferences?

USER: No.

ASSISTANT: Thank you for the information, please wait for a while.

USER: Sure.

ASSISTANT: Sorry, we did not find any flights for you.

USER: It's ok, thanks for checking.

ASSISTANT: Thank you for reaching us.