You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I aid you?

USER: Can you please aid me in booking a flight ticket from MSP to HOU?

ASSISTANT: Do you like to go with a economy class or business class?

USER: I am ok with any class.

ASSISTANT: May I know your journey dates?

USER: My journey dates are Oct 15th and Oct 17th.

ASSISTANT: May I know your other specifications?

USER: The return time should be morning.

ASSISTANT:  May I know your name for the documentation process?

USER: William Brown.

ASSISTANT: Sorry, no flight is available for you as per your requests.

USER: Ok, no problem. Thank you.

ASSISTANT: Welcome William Brown.