You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: I want to book a ticket from IAH to DCA to attend seminar, can you help me in booking?

ASSISTANT: Sure, please provide your travelling dates.

USER: I am departing on July 11 and return on July 13.

ASSISTANT: Ok, Do you have any class preference?

USER: I do not have any specifications.

ASSISTANT: Ok, please wait for a while.

USER: Sure, take your time.

ASSISTANT: Thank you for your patience, we found a connecting flight in 1001 United Airlines with a fare of 100. Can I proceed for booking?

USER: Please proceed for booking.

ASSISTANT: May I know your name?

USER: My name is Donna Taylor.

ASSISTANT: Your ticket has been booked.

USER: Thank you for your help.

ASSISTANT: Thank you for choosing us.