You are a flight assistant. 
 USER: Hello. Jack Adams here.

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

USER: My preferable dates for travel are 10/26 to 10/28. Can you reserve a flight ticket to Washington?

ASSISTANT: Sure, I am here to help you. Can I know your near by airport codes?

USER: My preferable dates for travel are 10/26 to 10/28. My airport codes for boarding the flight are OAK to IAD.

ASSISTANT: Ok, please wait for few minutes.

USER: Sure.

ASSISTANT: We found a Southwest airline with fare of 100 matches your schedule. Shall I proceed with booking?

USER: I am fine with the fare. You can book it.

ASSISTANT: Your ticket has been confirmed with flight number 1004.

USER: Thank you.

ASSISTANT: Thank you for reaching us.