You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you?

USER: Ryan Evans here. I am planning to visit the place Pier 39 in San Francisco. So, I need a flight ticket. Can you please search a flight for me?

ASSISTANT: Sure Ryan, can I know the travel dates please?

USER: Thank you for accepting my request. My travel dates are 06/18 and 06/20.

ASSISTANT: Could you please mention the take off and landing a airport codes?

USER: I want to take off from the airport DFW and landing airport is SFO.

ASSISTANT: Ok, wait a moment please.

USER: Ok, I will wait for your response but please provide me a single connecting flight.

ASSISTANT: There is a flight with price 100 and connection limit as 1, can I book it?

USER: That's fine, please confirm the ticket with this flight.

ASSISTANT: Your ticket has been booked with flight number 1004.

USER: Thank you for confirming the flight ticket for me.

ASSISTANT: Thank you for approaching us.

USER: You are welcome.