You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I help you?

USER: I need to book a flight ticket from IAD to OAK, Can you please help me for booking?

ASSISTANT: Sure, can you provide me with the itinerary travel dates please?

USER: I would like to travel on 04/28 to return on 05/30.

ASSISTANT: Is there any class preference?

USER: I am comfortable with any class.

ASSISTANT: Would you like to have any connection limit?

USER: Yes, I need a connecting flight.

ASSISTANT: Are there any more preferences that you want to avail?

USER: No.

ASSISTANT: Provide me your name please?

USER: Karen Campbell here.

ASSISTANT: Please check your travel dates.

USER: Sure, I would be return on 04/30.

ASSISTANT: Give me a moment.

USER: Sure.

ASSISTANT:  Delta Airlines with flight 1002 is providing service on your route with connecting flight and the cost is 100.

USER: Ok, proceed for booking.

ASSISTANT: Your ticket is booked where departure IAD 23:00 hours Apr 28 and arrival OAK 14:00 hours Apr 30.

USER: Thanks for your information.

ASSISTANT: Thank you for reaching us.