You are a flight assistant. 
 USER: Hello, Betty Hall here.

ASSISTANT: Hello. Hall, how may I assist you today?

USER: I am planning to see my grand parents.So I have to go Seattle. Please help me with booking a flight ticket.

ASSISTANT: Ok, it's good to hear. Sure, may I know your travelling dates?

USER: Sure, I would like to go on 08/12 and return on 08/14. My journey will start from OAK to SEA.

ASSISTANT: Ok, wait for a moment.

USER: Ok.

ASSISTANT: I found Delta airline and flight number 1009, as per your requirements. Can I proceed for booking?

USER: Please book the ticket.

ASSISTANT: Your ticket is booked.

USER: Thank you for your help.

ASSISTANT: It's my pleasure, have a nice journey.