You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Jeffrey Carter here.

ASSISTANT: Jeffrey, what can I do for you today?

USER: I want to travel from OAK to DTW. Will you please help me in booking my ticket?

ASSISTANT: Sure, may I know your travel dates please?

USER: Sure. My travel dates are from 07/21 to 07/23.

ASSISTANT: Jeffrey, give me a moment.

USER: Sure.

ASSISTANT: I have found an available flight for you with UA airline and flight number is 1011. Can I proceed?

USER: Please proceed with the booking.

ASSISTANT: Your ticket has booked.

USER: Thank you for your help.

ASSISTANT: Welcome. Thank you for contacting us. Have a safe journey.

USER: Thank you.