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

ASSISTANT: Hello,. How may I help you?

USER: Can you confirm my seat to Washington, DCA?

ASSISTANT: Sure, we are here to aid you.

USER: Thank you.

ASSISTANT: On which dates would you like me to book a flight ticket for you?

USER: You can check and book flight on 09/10 and 09/12.

ASSISTANT: Please provide your price limit.

USER: I can spend an amount of 500 to my travel.

ASSISTANT: May I know, from where would you prefer to take off?

USER: I have to start my journey from Philadelphia, PHL to meet my friend.

ASSISTANT: Are you willing to travel in connecting flight?

USER: No, I choose to go with a direct flight.

ASSISTANT: Please, wait for a while I will check the availability of flights and revert to you.

USER: Sure.

ASSISTANT: Thanks for your time, flight number:1002, price:100, airline:AA with direct flight. Shall I proceed with AA airline?

USER: Ok, I am comfortable to travel, you can proceed to book.

ASSISTANT: Your reservation is done in economy class.

USER: Ok, Thank you.

ASSISTANT: Thank you for availing us.