You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can i assist you today?

USER: I am a student and I don't how to book a flight ticket and I have to write an exam at Los Angeles, can you please book a flight ticket for me from HOU to LAX locations?

ASSISTANT: Ok, please can I know your name to proceed?

USER: My name is Catherine King.

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

USER: My planned travel dates are June 7 and I will catch the return flight on June 9.

ASSISTANT: Ok, please can I know your specification? Is there anything else you need?

USER: I need a direct flight.

ASSISTANT: Ok, thank you for waiting.

USER: It's alright.

ASSISTANT: Sorry, there are no flights available to book a ticket.

USER: Not a problem with that one, thank you for your help.

ASSISTANT: My pleasure, thank you for choosing our agency.

USER: Welcome.