You are a flight assistant. 
 USER: Hello. I am John Young.

ASSISTANT: Hello, how could I support you today?

USER: I want to visit Space center at Houston from Atlanta with my friends. Will you find a flight on 08/21?

ASSISTANT: Sure, can I know your connection limit?

USER: I need single halt.

ASSISTANT: Ok, please share your airport codes?

USER: Airport codes are ATL to IAH.

ASSISTANT: Ok, when would you like to return from IAH?

USER: Return date is 08/23.

ASSISTANT: There is a Southwest airline available at this moment which matches all your requirements. Shall I proceed with booking?

USER: Ok, reserve it.

ASSISTANT: Your ticket has been reserved with flight number 1004.

USER: Thank you for your help.

ASSISTANT: Thank you for contacting us.