You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you today?

USER: I would like to travel from OAK to SFO as a business trip.

ASSISTANT: Sure, can I have your travel dates please?

USER: My journey dates are 12/13 and 12/15.

ASSISTANT: Ok, please let me know your  preferable timings of your journey.

USER: I am comfortable with any timings.

ASSISTANT: Do you  have any other specifications?

USER: I need break in my journey.

ASSISTANT: Can I have your good name please?

USER: George Phillips here.

ASSISTANT: Sorry George Phillips, no flight is available to you on  your dates.

USER: No problem, Thanks for the information.

ASSISTANT: Thank you for choosing us, have a good day.