You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Rachel Lewis.

ASSISTANT: What help is required from our agency?

USER: On the occasion of my Birthday, I would like to distribute some clothes to the school children. So I would like to travel Detroit to reach an international store to buy some clothes in whole sale.So, can you please search a flight ticket for me?

ASSISTANT: Can you please provide the travel dates?

USER:  I have to do shopping  on 06/26. So, I would like to depart on 06/25 then only I can shop in time and my return date is 06/27.

ASSISTANT: Can you please let me know your take off and landing airport codes?

USER: My takeoff airport code is Oakland OAK and my landing airport code is DTW.

ASSISTANT: Ok, wait a moment please.

USER: Ok, I can wait for your reply.

ASSISTANT: JetBlue airline is providing a service on your route with price 200, can I book it?

USER: Ok, I have satisfied with your details. Please confirm my ticket?

ASSISTANT: Your ticket has been booked with flight number 1015.

USER: Thank you for booking.

ASSISTANT: You are welcome.