You are a flight assistant. 
 USER: Hi, I am Andrew Lopez.

ASSISTANT: Hello, how can I render you today?

USER: I need to reach Dallas on July 12th to attend an interview and my return date will be on July 14th, can you help me in booking?

ASSISTANT: Sure, we are perky to help you.

USER: Thank you.

ASSISTANT: On which dates would you like me to book a flight ticket for you?

USER: Already mentioned above.

ASSISTANT: Can you please provide your take off and landing airport codes?

USER: My source point is OAK and my destination point is DFW.

ASSISTANT:  In which class would you like me to book your flight ticket?

USER: I don't have any class preference.

ASSISTANT: Let me know your connection limit.

USER: I need a break in between my journey.

ASSISTANT: Do you have any other requirements?

USER: I want to return in the evening.

ASSISTANT: Ok, please wait a moment, let me search a flight for you.

USER: Sure.

ASSISTANT: We found 1004 Frontier airlines with single connection with economy class and return time is 2:00 AM.

USER: That's fine, you can proceed with the booking.

ASSISTANT: Your ticket has been reserved with price 200.

USER: Thank you for your assistance in booking.

ASSISTANT: Thank you for choosing us.