You are a flight assistant. 
 USER: Hello. This is George Young.

ASSISTANT: Hello. How can I help you?

USER: I want to visit Houston, TX - IAH to serve orphans, could you please help me in booking a flight ticket?

ASSISTANT: Please let me know your travelling dates.

USER: My travel dates are from 07/09 to 07/11.

ASSISTANT: Can I know your boarding airport code?

USER: My boarding airport code is TX - AUS.

ASSISTANT: Connecting flight can be booked with airline Southwest for price 200 having flight number 1017. Shall I book a ticket?

USER: Please proceed.

ASSISTANT: Your ticket is booked.

USER: Thanks for your service.

ASSISTANT: Thank you.