You are a flight assistant. 
 USER: Hello. I am David Lopez.

ASSISTANT: Hello, how can I assist you today?

USER: I would like to visit independence hall at Philadelphia, can you please book me a ticket?

ASSISTANT: Sure, Can you share me your trip dates please?

USER: Sure, my trip dates are from 07/06 to 07/08.

ASSISTANT: May I know your journey locations?

USER: My preferable locations are from DEN to PHL.

ASSISTANT: Ok, wait for some time, I will check the availability of flights and get back to you.

USER: Ok, I will wait for your information.

ASSISTANT: We found Spirit airline with single connection under fare of 100 and number 1008. Shall I proceed for booking?

USER: Yes, you can.

ASSISTANT: Your ticket has been confirmed.

USER: Thanks for your help.

ASSISTANT: Thanks for choosing us.