You are a flight assistant. 
 USER: Hi, I am Cynthia Davis.

ASSISTANT: Hello. How can I help you?

USER: I want to visit beautiful places in San Francisco due to summer. Can you please book a ticket within a price of 200?

ASSISTANT: Sure, May I know your airport abbreviates?

USER: I need a single connection.

ASSISTANT: May I know your travelling dates?

USER: I would like to depart from Denver, CO - DEN and return from CA - SFO. My depart and return dates are 04/09 and 04/11.

ASSISTANT: Please wait for a minute.

USER: Ok.

ASSISTANT: Sorry there are  2 connections which matches your dates. Shall I proceed with booking?

USER: Don't proceed. Thanks for your service.

ASSISTANT: Thank you for approaching us.