You are a flight assistant. 
 USER: Hi, I am Jennifer Baker from Phoenix.

ASSISTANT: Hello, how can I be your helping hand?

USER: I am planning to visit Washington to overview the city, so please aid me in booking a flight within a fare of 500.

ASSISTANT: Sure. May I know your boarding and landing airport codes please?

USER: My boarding and landing airport codes are PHX - IAD.

ASSISTANT: Can I have your travelling dates please?

USER: I wish to start my journey on 10/22 and intend to recur on 10/24.

ASSISTANT: Do you need a lay by in between your journey?

USER: Yes, I need it.

ASSISTANT: Thank you for sharing your details. Please, wait for a while.

USER: Sure.

ASSISTANT: Thank you for being patience, there is a flight available with Hawaiian airline, flight number 1029 with fare 100 and a lay by. Shall I proceed to book?

USER: Ok, you can confirm my booking.

ASSISTANT: Your booking has been confirmed.

USER: Thank you.

ASSISTANT: Thank you for reaching us.