You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I be of your service?

USER: I am Patrick Brown. I would like to attend for friend's marriage who are staying in Dallas & Fort Worth TX-DFW. Will you please help me in booking a flight reservation?

ASSISTANT: Sure, we are here to make your journey comfort.

USER: Thank you.

ASSISTANT: May I know your connection preference?

USER: I need a single connection in between my journey.

ASSISTANT: Please let me know your source airport code.

USER: My source airport code is CA-OAK.

ASSISTANT: Could you please let me know your planned travelling dates?

USER: My planned travelling dates are 06/14 and 06/16.

ASSISTANT: What price would you like to put on flight ticket?

USER: I can spend upto 200 as my budget.

ASSISTANT: Ok, please wait a moment I will search best flight for you.

USER: Sure.

ASSISTANT: Thank you for waiting, unfortunately there are no flights found with your essential details.

USER: Ok, no issues. Thank you.

ASSISTANT: Thank you for reaching you.