You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello, What can I do for you today?

USER: I am Dennis Miller.

ASSISTANT: Ok.

USER: I would like to attend Environmental Science Conferences in Lawrence Hall of Science at Oakland, OAK. Can you please make a reservation under the fare of 500.

ASSISTANT: Sure, could you please mention your planned trip dates?

USER: My journey dates 11/25 and 11/27.

ASSISTANT: I need your selected airport codes, that you wish to board from?

USER: My source point is DFW.

ASSISTANT: We found a connecting flight in Delta airline with a fare of 100 and the connection is one. Shall I proceed?

USER: Ok, proceed.

ASSISTANT: Your booking is done in Delta airline.

USER: Thanks for your service.

ASSISTANT: Thank you for reaching us.