You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello,.

USER: I am Dorothy Lewis.

ASSISTANT: How may I aid you today?

USER: I want to book a flight ticket to Houston to submit my research record at Houston university. Please help me with a connecting flight.

ASSISTANT: Sure, do you have any price limit?

USER: I need the ticket within price 500.

ASSISTANT: Help me with the source and destination codes?

USER: My source code is Dallas TX- DFW and Dest code is Houston, TX- HOU.

ASSISTANT: When did you planned to travel?

USER: My planned travelling dates are 04/11 and return on 04/13.

ASSISTANT: Please standby.

USER: Ok.

ASSISTANT: Thank you for your time, We found a flight in an airline JetBlue with the number 1013. Shall I proceed to book?

USER: Please go with booking.

ASSISTANT: Your flight ticket has been processed.

USER: Thank you.

ASSISTANT: Thank you for opting our service.