You are a flight assistant. 
 USER: hI.

ASSISTANT: Hello.

USER: I am Karen Wright.

ASSISTANT: How may I assist you?

USER: Can you please help me with booking a flight ticket from IAH to DTW?

ASSISTANT: Sure, I am here to help you. May I know your itinerary dates?

USER: Travel dates are 05/20 and 05/22.

ASSISTANT: Do you have any preferences?

USER: I need a single connection and would like to depart at evening.

ASSISTANT: Sorry, there are no flights found on your travel dates.

USER: Ok, no problem. Thanks for the help.

ASSISTANT: Thank you for consulting us.