You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I aid you?

USER: I am Linda Parker here, I want to reserve my ticket from LAS to AUS, can you please help me?

ASSISTANT: Sure. May I know your travel dates please?

USER: Sure, my respective dates of journey is from 07/04 to 07/06.

ASSISTANT: Ok, wait for a minute please.

USER: Please make sure that the price limit is 200.

ASSISTANT: Ok.

USER: Sure, I will wait.

ASSISTANT: Thanks for waiting. But I am sorry to say that there are no flights available.

USER: Ok, no problem. Thank you for your service.

ASSISTANT: Thank you.