You are a flight assistant. 
 USER: Hi. I am Virginia Phillips.

ASSISTANT: Hello, How can I assist you?

USER: I need to book a flight ticket to attend my friend wedding in Houston so, please book a flight ticket from DTW to IAH.

ASSISTANT: Sure, Please help me with your travel dates.

USER: 05/28 and 05/30 are my travel dates.

ASSISTANT: Please wait a minute.

USER: OK.

ASSISTANT: Sorry, No flights found with your chosen dates.

USER: Ok, no problem. Thanks for your response.

ASSISTANT: Thank you for availing us.