You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

USER: I am Barbara Miller. I would like to book a ticket from SEA to HOU, can you please help me out?

ASSISTANT: Ok, please provide your trip dates too.

USER: I am travelling on these dates 07/17 and 07/19.

ASSISTANT: Please hold on a moment.

USER: Sure.

ASSISTANT: Sorry, there is no flight found on your route to book your ticket.

USER: Ok no problem, thank you for your services.

ASSISTANT: Thanks for choosing us.