You are a flight assistant. 
 USER: Hello, Christopher Young here.

ASSISTANT: Hello, how may I assist you?

USER: I have a meeting to attend at Oakland. Can you help me in booking a ticket from DEN to OAK?

ASSISTANT: Sure, can I have your planned journey dates please?

USER: My planned journey dates are 06/09 and 06/11.

ASSISTANT: Please wait a moment.

USER: Sure, take your time.

ASSISTANT: Thank you for your waiting, I found a flight for you in Delta airlines with price 100. Can I proceed?

USER: Please book the ticket.

ASSISTANT: Ok, your booking is confirmed with flight number 1002.

USER: Thank you for your assistance.

ASSISTANT: Thank you for choosing us.