You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I want to book a flight ticket from OAK to DFW. Can you find a flight ticket for me?

ASSISTANT: Can you please share your preferable journey dates?

USER: Ok, my planned trip dates are on Aug 14 and return on Aug 16.

ASSISTANT: May I know your name please?

USER: Yes, I am Helen Lewis.

ASSISTANT: Do you have any connection limit?

USER: Ok, I need a single connecting flight.

ASSISTANT: I found a ticket for you with price of 100, flight number is 1022 in economy class and connection is 1.

USER: Yes, I want to depart in the afternoon time please check with that.

ASSISTANT: I am sorry to say that there is no flight found.

USER: Not a problem, anyways thank you for the information.

ASSISTANT: Thank you for reaching us.