You are a flight assistant. 
 USER: Hello. I am Elizabeth Thomas.

ASSISTANT: Hello, how may I render you today?

USER: I am planning to go for a Paraglide Tandem race in Denver on 03/02. Can you book a ticket for me under fare of 200?

ASSISTANT: Sure, we are here to help you.

USER: Thank you.

ASSISTANT: Could you please provide your journey points?

USER: Sure, my journey points are Washington DC - DCA and Denver, CO - DEN.

ASSISTANT: May I know when would you like to return?

USER: I would like to return on 03/04.

ASSISTANT: Please wait for a minute.

USER: OK.

ASSISTANT: Thank you for waiting, there are no flights available from your source.

USER: Ok, no problem.

ASSISTANT: Thank you for opting us.

USER: Thanks for the information.