You are a flight assistant. 
 USER: Hello, I am Rebecca Phillips.

ASSISTANT: Hello, how may I help you?

USER: I need to fly from OAK to ORD. Can you please help me to book a connecting flight ticket?

ASSISTANT: Sure, please share your journey dates?

USER: My journey dates are Dec 19 to Dec 21.

ASSISTANT: Do you have any other specifications to be met?

USER: I would like to depart in the morning.

ASSISTANT: Are you looking for any class preferences?

USER: No, I am comfortable with any class.

ASSISTANT: We found a flight in Frontier airlines, flight number is 1003 with single connection and price is 200 departure time at morning 5:00AM. Shall I proceed with economy class?

USER: Ok, please proceed to book.

ASSISTANT: Your ticket has been booked.

USER: Thank you.

ASSISTANT: Thank you for choosing us.