You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: Gary Hernandez here.

ASSISTANT: How can I assist you at this moment?

USER: Can you please help me in booking a ticket from OAK to DTW?

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

USER: My travel dates are 01/26 and 01/28.

ASSISTANT: Wait a moment please.

USER: Sure.

ASSISTANT: Gary Hernandez, there are no flights available on this route due to typical climatic conditions.

USER: That's fine, thank you for your service.

ASSISTANT: Thank you for contacting us.