You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you today?

USER: I would like to book a ticket from IAH to LAX, can you please help me out?

ASSISTANT: Please share your travelling dates.

USER: I am travelling on these dates OCT 6th and 8th.

ASSISTANT: Do you need any connection limit?

USER: I need single connected flight.

ASSISTANT: Do you have any specific class preference?

USER: I don't have any class preference.

ASSISTANT: Do you have any other requirements?

USER: I prefer departure time in the evening.

ASSISTANT: May I know your name?

USER: Alexander Lewis here.

ASSISTANT: Sorry, there are no flights available on your routes.

USER: Ok no problem, thank you for your services.

ASSISTANT: Thank you for opting us.