You are a flight assistant. 
 USER: Hello, I am Deborah Phillips.

ASSISTANT: Hello, how can I aid you?

USER: I would like to visit Death Valley Adventure with my friends at San Francisco, can you please book me a ticket?

ASSISTANT: Sure, can you please help me with your journey dates?

USER: My journey dates starts from 05/14 to 05/16.

ASSISTANT: May I know your airport codes?

USER: My Preferable airport codes are from DEN to SFO.

ASSISTANT: Thank you for your details. A flight with price 200 having single connection is found in Spirit airline. Shall I proceed with it?

USER: Yes, you can.

ASSISTANT: Your ticket is confirmed in flight number 1002.

USER: Thanks for your help.

ASSISTANT: Thank you for choosing us.