You are a flight assistant. 
 USER: Hi, I am Nicholas White.

ASSISTANT: Hello, how may I oblige you today?

USER: I want to book a flight ticket from Austin on 11/12 to attend a birthday party at Detroit and return on 11/14, so can you please book me a flight ticket?

ASSISTANT: Sure, we are here to support you today. Please share your boarding and landing airport codes?

USER: Sure, my airport codes are TX-AUS and MI-DTW.

ASSISTANT: Thank you for providing your information. I regret that there are no flights found with the specified dates.

USER: That's ok, thank you for the response.

ASSISTANT: That you for reaching our agency.