You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: Can you help me to book a flight ticket from ATL to OAK?

ASSISTANT: May I know your dates on which you are planning to depart and arrive?

USER: My travel dates are Apr 14 and Apr 16.

ASSISTANT: Are you comfortable with connecting flight or direct flight?

USER: I prefer connecting flight for this trip.

ASSISTANT: Are you comfortable with economy class flight or business class flight?

USER: I am comfortable with any class.

ASSISTANT: Is there any other preferences that you would like to add before booking?

USER: No, thanks for asking.

ASSISTANT: May I know your name for the documentation process?

USER: I am Patrick Walker.

ASSISTANT: Thanks for sharing your details, we are unable to provide flight in between your journey routes.

USER: No problem, thank you for the information.

ASSISTANT: Thank you for reaching us.