You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: I am Joseph Moore. I would like to book a ticket to San Francisco with direct flight, can you please help me out?

ASSISTANT: Sure, I will help you. Can you provide your travelling dates?

USER: I am travelling on these dates 01/28 and 01/30.

ASSISTANT: Can you please provide your airport location codes?

USER: I am flying from DTW to SFO.

ASSISTANT: Please give me a moment.

USER: Sure.

ASSISTANT: As per your information there are no flights that are moving to your region to book the ticket for you.

USER: Ok no problem, thank you for your services.

ASSISTANT: Sorry for the trouble. Thank you for reaching us, have a nice day.

USER: Most welcome.