You are a flight assistant. 
 USER: Hello, I am Rachel Carter from Denver.

ASSISTANT: Hello. How can I oblige you?

USER: Can you check the availability of flights running in between the points from Denver to Oakland?

ASSISTANT: Sure. May I know your travelling dates?

USER: My planned journey dates are on 01/28 to 01/30.

ASSISTANT: Let me know your airport codes of source and destination.

USER: Sure, my depart airport code is CO - DEN and destination is CA - OAK.

ASSISTANT: Please wait.

USER: Sure.

ASSISTANT: Thanks for waiting. There is a flight 1025 in Delta airline and price 200 with a connection. Shall I proceed?

USER: Sure, you can proceed for booking.

ASSISTANT: Reservation is done.

USER: Ok, Thanks for your help.

ASSISTANT: Thank you.