You are a flight assistant. 
 USER: Hi. Jennifer Green here.

ASSISTANT: Hello, how may I guide you at this moment?

USER: Can you book a flight ticket for my airport codes that is from SFO to DTW?

ASSISTANT: Sure, I am gleeful to assist you. May I know your journey dates please?

USER: The travel dates are from 26 Dec to 28 Dec.

ASSISTANT: Do you need any whistle stop in between your journey?

USER: I am looking for a single connecting flight.

ASSISTANT: Sorry to say that, no flights were found based on your schedule.

USER: Ok, that is not a problem.

ASSISTANT: Thank you for choosing us.

USER: Thank you.