You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I aid you today?

USER: I have a plan to visit flower festival at Washington, please book a flight ticket under price 500.

ASSISTANT: Sure, we are here to help you.

USER: tahnk you. Thank you.

ASSISTANT: Can you share me your source point and destination point?

USER: My source point is IAH and destination code is DCA.

ASSISTANT: Let me know when you are willing to travel to book a flight ticket?

USER: My travelling dates are May 3rd and 5th.

ASSISTANT: May I know your name?

USER: I am Melissa Harris.

ASSISTANT: Ok, wait for some time I will check and get back to you.

USER: Ok.

ASSISTANT: We found UA airline with connecting flight and number 1022 fare of 200. Shall I proceed for booking?

USER: Please go ahead.

ASSISTANT: Your ticket has been confirmed.

USER: Thanks for the reservation.

ASSISTANT: Thanks for approaching us.