You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Susan Young.

ASSISTANT: How can I help you?

USER: I want to book a ticket from DFW to OAK, can you help me?

ASSISTANT: Let me know your travelling dates.

USER: My travel dates are 04/21 and 04/23.

ASSISTANT: Do you have any preference?

USER: I want to return in the morning.

ASSISTANT: Ticket is found with airline Southwest for price 600 having flight number 1000.

USER: You can book it.

ASSISTANT: Ticket is booked.

USER: Thank you for booking.

ASSISTANT: Thank you.