You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Lisa Moore.

ASSISTANT: How can I aid you?

USER: I am going to my friend's in Washington, so can you help me booking flight from LAX to IAD?

ASSISTANT: Sure, I will help you in booking. Can you please share your planning dates of journey?

USER: My travelling dates are 09/01 and 09/03.

ASSISTANT: Please hold on for a while.

USER: Ok, I will wait for your reply.

ASSISTANT: Sorry, no flights are available on your route.

USER: Oh! It's ok, no problem. Thank you for your services.

ASSISTANT: Do you have any other planning dates to travel?

USER: No, thanks.

ASSISTANT: Thank you for choosing our service.