You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Myself Ryan Williams, can you help me to book a flight ticket from OAK to IAD?

ASSISTANT: Sure, I can help you with that. May I know your preferable travel dates please?

USER: Ok, please book for the dates 01/07 and 01/09 respectively.

ASSISTANT: Ok, please be on hold. AA airlines is having a flight on that route with travel charge of 200, shall I proceed for booking?

USER: Ok, please book.

ASSISTANT: I have successfully booked your ticket with flight-1009, have a safe journey.

USER: Ok, thank you for assisting me.

ASSISTANT: Thank you for choosing us.