You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Jonathan Hall here.

ASSISTANT: How can I help you?

USER: I want to book a ticket from SFO to PHX for halloween party.

ASSISTANT: Please provide your travel dates?

USER: My travelling dates are from 01/27 to 01/29.

ASSISTANT: There is no flight available, Hall. Do you want to know anything else?

USER: No, that's ok. Thank you for your support.

ASSISTANT: Thanks for reaching us.