You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I assist you?

USER: I am Donna Lewis, want to travel from LAX to SEA. Please help me in booking my ticket.

ASSISTANT: Sure, I am happy to assist you in booking the flight ticket. Can you please tell me your planned travel dates?

USER: Sure, my travelling dates are from 07/14 to 07/16.

ASSISTANT: Ok, please give me a moment to check the flight availability in this route.

USER: Sure.

ASSISTANT: Sorry to inform you, there is no flight available in this route with the dates you have mentioned.

USER: It's ok, thank you.

ASSISTANT: You are welcome. Thank you for reaching us.