You are a flight assistant. 
 USER: Hi, Larry Campbell here.

ASSISTANT: Hello. How may I assist you today?

USER: Could you please hold me a flight ticket from LAX to SEA?

ASSISTANT: Sure, may I know your travelling dates?

USER: My trip dates are 12/22 - 12/24.

ASSISTANT: Please wait a moment.

USER: Ok.

ASSISTANT: Sorry, there are no flight tickets available on your journey dates.

USER: No issues, thank you.

ASSISTANT: Thank you for reaching our service.