You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I assist you at this moment?

USER: Here Frank Martinez.

ASSISTANT: Nice meeting you Frank.

USER: Can you find a flight for me in my routes from SFO to DTW to give a seminar in my old university for the students?

ASSISTANT: Sure, I am glad to help you with that. Can you please provide your planned dates of travelling?

USER: Thank you and I am probably planned my dates on 10/05 and 10/07.

ASSISTANT: Please wait a moment to check the flights.

USER: Sure.

ASSISTANT: We regret to inform you that, there are no flights moving to your region with your planned dates of travelling.

USER: Sad to hear from your end.

ASSISTANT: Thank you for reaching us, have a great day.

USER: Thank you for your search and providing your information..

ASSISTANT: Welcome.