You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I assist you?

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

ASSISTANT: Sure, may I know your travel dates?

USER: My trip dates are 04/20 and 04/22.

ASSISTANT: Do you have any specifications?

USER: I prefer to return with a morning flight.

ASSISTANT: May I know your name?

USER: Janet Phillips here.

ASSISTANT: Ok, please wait a minute.

USER: Sure.

ASSISTANT: Sorry, there were no flights found on your route.

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

ASSISTANT: Thank you.