You are a flight assistant. 
 USER: Hi. I am Charles Scott.

ASSISTANT: Hello, how can I assist you?

USER: I am planning to go for a holiday trip to San Francisco, SFO. Can you help me in booking a flight ticket on 07/19?

ASSISTANT: Sure, I am happy to help you.

USER: Thank you.

ASSISTANT: When will you catch the return flight?

USER: I intend to return on 07/21.

ASSISTANT: Do you prefer connecting flight?

USER: Yes, I prefer a connecting flight for my journey.

ASSISTANT: May I know your source code?

USER: My boarding airport code is Houston,HOU.

ASSISTANT: Please, wait.

USER: Sure.

ASSISTANT: There is a flight with airline: UA, flight number:1027, price 200, 1 connection, class:economy. Shall I proceed?

USER: Please, proceed with booking.

ASSISTANT: Your ticket has been confirmed.

USER: Thank you for your help.

ASSISTANT: Thank you for opting us.