You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I want to book a ticket from LAX to PHL, can you help me?

ASSISTANT: Sure, please provide your planned dates.

USER: My travel dates are 01/24 and 01/26.

ASSISTANT: Please hold on for a moment.

USER: Ok.

ASSISTANT: May I know your name for further proceedings?

USER: Myself Alexander Young.

ASSISTANT: Sorry Young, no flight is available.

USER: Not an issue, thanks for your help.

ASSISTANT: Thank you for contacting us.