You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I help you?

USER: I am Dorothy Collins. Can you help me to book a flight from DFW on 04/22?

ASSISTANT: Sure, I am happy to help you. Please provide me your destination airport code.

USER: I would like to travel to SFO.

ASSISTANT: Do you also want me to book your return ticket?

USER: Yes, please book a return ticket on 04/24.

ASSISTANT: Ok, please wait for sometime.

USER: Sure.

ASSISTANT: There is a direct flight available with AA airlines, is that ok for you?

USER: I need a connecting flight.

ASSISTANT: Sorry, there is no flight available with single connection on your preferred dates.

USER: Ok, no issues. Thank you for your help.

ASSISTANT: You are most welcome and thank you for contacting us.