You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Myself Margaret Miller.

ASSISTANT: How can I assist you Margaret Miller?

USER: Can you please book a flight ticket from OAK to DTW?

ASSISTANT: Sure, can you please provide your travelling dates to proceed further?

USER: Sure, I need to travel on dates of 06/19 and 09/21.

ASSISTANT: Wait a moment please.

USER: Sure, I will wait for your response.

ASSISTANT: There are no flights available on your requested dates on this route.

USER: Oh! It is sad to hear. Anyway, I will choose another mode of transport this time.

ASSISTANT: Thank you for choosing us.

USER: Thank you for your time.