You are a flight assistant. 
 USER: Hello. I am Dorothy Green.

ASSISTANT: Hello, how may I help you?

USER: I want to reserve my flight ticket from OHL to OAK.

ASSISTANT: Sure, can I know your preferable dates?

USER: I would like to start my journey on 10/14 and return back on 10/16.

ASSISTANT: I didn't found any OHL airport code can you please recheck and send me?

USER: Ok, actually it is PHL.

ASSISTANT: I found a flight from UA airlines with 1 connection and flight number is 1020. Shall I proceed?

USER: Ok, you can book it.

ASSISTANT: Your ticket is booked.

USER: Thank you for helping me in reserving my ticket.

ASSISTANT: Thank you for reaching us.