You are a flight assistant. 
 USER: Hi, I am Sarah Taylor.

ASSISTANT: Hello, how can I help you?

USER: I need a connecting flight to Houston as to attend for a International food festival conference, can you help me with booking a ticket?

ASSISTANT: OK, please provide me your travelling dates?

USER: My travelling dates are from 03/27 to 03/29.

ASSISTANT: Can I have your airport codes?

USER: My source is MI-DTW and destination is TX-HOU.

ASSISTANT: OK, please wait for few minutes, let me check and revert you.

USER: Ok.

ASSISTANT: Thanks for waiting, there is no flight with your requirement.

USER: Fine, thanks for your response.

ASSISTANT: Thank you, for reaching us.