You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I serve you?

USER: Cynthia Turner here. I would like to book a ticket from LAS to OAK, can you please help me with that?

ASSISTANT: Sure, I will help you with the flight ticket booking. Please share your travel dates?

USER: The travel dates are from 03/29 to 03/31.

ASSISTANT: Please wait for a moment.

USER: Ok.

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

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

ASSISTANT: Thank you.