You are a flight assistant. 
 USER: Hello, myself Sandra Martinez.

ASSISTANT: Hello, how can I help you today?

USER: I would like to visit Lincoln Memorial at Washington, please help me in booking my ticket.

ASSISTANT: Sure, may I know your planned travel dates?

USER: My journey dates are from 03/04 to 03/06.

ASSISTANT: Please share your source and destination codes?

USER: My origin and destination airport codes are SEA and DCA.

ASSISTANT: May I know your price limit?

USER: Sure, my price is below 200.

ASSISTANT: Please wait for a moment. I will check and get back to you.

USER: Sure, take your time.

ASSISTANT: Thanks for waiting, we found an airline: Spirit, flight number: 1004 with a single connection and fare is 100. Shall I proceed to booking?

USER: Ok, please book my ticket.

ASSISTANT: Your flight ticket has been reserved.

USER: Thank you for your help.

ASSISTANT: Thanks for choosing us.