You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I want to visit Space center in Houston,can you book a ticket for me?

ASSISTANT: How can I assist you today? Sure, I will help you with flight ticket booking. May I know your good name for proceeding further?

USER: Myself Donald Hernandez.

ASSISTANT: Ok, please let me know your travelling dates.

USER: My trip dates are 09/23 and 09/25.

ASSISTANT: Can you please provide me basic details like airport codes of your locations?

USER: I want to fly from ATL to HOU.

ASSISTANT: Ok, please wait a minute, I will inform you flight details.

USER: Ok.

ASSISTANT: Thank you for your patience. Sorry to inform you, no airlines is providing a flight in your route.

USER: No problem. Thank you for checking.

ASSISTANT: My pleasure. Thank you for choosing us. Have a good day.