You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I aid you?

USER: Can you please help me to book the flight ticket from SFO to LAX?

ASSISTANT: Sure, may I know your travel dates?

USER: My travel dates are Mar 31 and Apr 1.

ASSISTANT: Do you have any specifications?

USER: I would like to depart in the morning and I like to return in the afternoon.

ASSISTANT: May I know your name?

USER: Raymond Allen.

ASSISTANT: Ok, please wait a minute.

USER: Ok.

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

USER: Ok, thank you for the information.

ASSISTANT: Thank you for reaching us.