You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

USER: I am Patricia Perez. I want a flight ticket to San Francisco. Can you please help me in booking a ticket?

ASSISTANT: Sure, I will help you out.

USER: Thank you.

ASSISTANT: May I know your travelling dates please?

USER: My travelling dates are 07/10 and 07/12.

ASSISTANT: Can I know your airport codes please?

USER: The airport codes are IAD and SFO.

ASSISTANT: OK, please wait for a while.

USER: Sure, please make sure that the price should not exceed 200.

ASSISTANT: There is a flight with connection 1 and price 200, can I proceed with this flight?

USER: That's perfect, please book the ticket.

ASSISTANT: Ok, your ticket has been booked.

USER: Thank you for assisting me.

ASSISTANT: Thank you for reaching us.