You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you at this moment?

USER: Please book a flight ticket from IAH to LAX.

ASSISTANT: Sure, I am here to help you. Can you please provide your journey dates?

USER: July, 17 and July, 19 are my journey dates.

ASSISTANT: Do you have any connection limit preference?

USER: I would prefer single connection.

ASSISTANT: Do you have any class preference?

USER: No, thank you.

ASSISTANT: Do you have any other specifications for this trip?

USER: No, thank you.

ASSISTANT: May I know your good name please?

USER: Pamela Martinez here.

ASSISTANT: Pamela Martinez, there are no flight services are available on this route on your provided dates.

USER: That's ok, thank you for the information.

ASSISTANT: Thank you for contacting us.